{"title":"Visual Astronomy Filters","description":"\u003cp\u003eVisual astronomy is all about getting photons to your eyeball, but sometimes there are challenges. The moon is too bright. There's not enough contrast on Jupier's cloud bands. Light pollution is washing out fine detail in deep sky objects. Guess what. There's a filter for that. This collection is full of filters that can improve your viewing experience by priotitising the right wavelengths of light and cutting down on the wrong ones. \u003c\/p\u003e","products":[{"product_id":"antares-neutral-density-filter-13-1","title":"Antares 1.25\" Neutral Density Filter 13% (ND13)","description":"\u003cp\u003eWhen observing the moon or planets, a lot of the time there is just too much light! A-Star Telescope carries the Antares 13% and 25% (ND) neutral density polarizing filters to cut the brightness down to size. Available also for 2\" eyepieces.\u003c\/p\u003e\n\u003cp\u003eNeutral density filters can reduce brightness across the visual spectrum without losing resolution, enhancing lunar-planetary observing. Can be used stacked with colour filters. The ND13 transmits 13% and threads into all 1.25\" accessories.\u003c\/p\u003e\n\u003cp\u003eNOT FOR SOLAR VIEWING\u003c\/p\u003e","brand":"Sky Instruments","offers":[{"title":"Default Title","offer_id":42102765912316,"sku":"ND13","price":29.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/products\/filter-125-neutral-density-13-sw.jpg?v=1760131413"},{"product_id":"antares-neutral-density-filter-13-2","title":"Antares 2\" Neutral Density Filter 13% (2ND13)","description":"\u003cp\u003eWhen observing the moon or planets, a lot of the time there is just too much light! All-Star Telescope carries the Antares 13% neutral density (ND) polarizing filter for two inch eyepieces to cut the brightness down to size.\u003c\/p\u003e\n\u003cp\u003eNeutral density filters can reduce brightness across the visual spectrum without losing resolution, enhancing lunar-planetary observing. Can be used stacked with color filters. The 2ND13 transmits 13% and threads into all 2\" accessories.\u003c\/p\u003e\n\u003cp\u003eNOT FOR SOLAR VIEWING.\u003c\/p\u003e","brand":"Sky Instruments","offers":[{"title":"Default Title","offer_id":42102766010620,"sku":"2ND13","price":39.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/products\/filter-2-neutral-density-13-sw.jpg?v=1645475908"},{"product_id":"antares-neutral-density-filter-25-1","title":"Antares 1.25\" Neutral Density Filter 25% (ND25)","description":"\u003cp\u003eWhen observing the moon or planets, a lot of the time there is just too much light! A-Star Telescope carries the Antares 13% and 25% (ND) neutral density polarizing filters to cut the brightness down to size. Available also for 2\" eyepieces.\u003c\/p\u003e\n\u003cp\u003eNeutral density filters can reduce brightness across the visual spectrum without losing resolution, enhancing lunar-planetary observing. Can be used stacked with colour filters. The ND25 transmits 25% and threads into all 1.25\" accessories.\u003c\/p\u003e\n\u003cp\u003eNOT FOR SOLAR VIEWING.\u003c\/p\u003e","brand":"Sky Instruments","offers":[{"title":"Default Title","offer_id":42102766076156,"sku":"ND25","price":29.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/products\/filter-125-neutral-density-25-sw.jpg?v=1645475866"},{"product_id":"celestron-uhclpr-1-filter","title":"Celestron UHC\/LPR 1.25\" Light Pollution Filter (94123)","description":"\u003cp\u003eOur 1.25\" Light Pollution Reduction (LPR) Filters are designed to selectively reduce the transmission of certain wavelengths of light, specifically those produced by artificial light. This includes mercury vapour, and both high and low pressure sodium vapour lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. sky glow).\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe ultra high contrast (UHC) LPR filter has improved contrast over the typical broadband filters. Sky background is darker, and contrast of emission nebulae are noticeably improved. The advanced technology coatings enable the filter to achieve an outstanding transmission of over 97% across the entire bandpass, with total blockage of prominent light pollution lines. The perfect filter for viewing nebula from light polluted skies, or for boosting the contrast of nebula from dark sky sites.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eIn addition to it's optimum spectral and optical characteristics, the UHC\/LPR filter offers important features that set it apart and result in the highest quality celestial views:\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe multi-layer dielectric coatings are plasma assisted and Ionbeam hardened using the latest technology for durability and resistance to scratching.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eImproved transmission translates to maximum image brightness and contrast. Users of smaller, 4\"-11\" telescopes will especially appreciate the high efficiency, and larger scope users will love the rich star fields and detailed subtle nebular shadings that are left intact.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe high transmission, sharp cutoffs, and more moderate 60nm passband of the UHC\/LPR filter retains a more natural view, yet significantly boosts overall contrast. Imagers will appreciate the broader bandpass and inclusion of an extremely efficient H-Alpha passband (656nm).\u003cbr\u003e\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":42102774595836,"sku":"94123","price":130.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/products\/24123-125-inch-filter_01_570x380_2x_69476762-ae99-4c0c-b3bd-44cd1c2f0003-sw.jpg?v=1645509622"},{"product_id":"celestron-uhclpr-2-filter","title":"Celestron UHC\/LPR 2\" Light Pollution Filter (94124)","description":"\n\u003cp\u003eOur 2\" Light Pollution Reduction (LPR) Filters are designed to selectively reduce the transmission of certain wavelengths of light, specifically those produced by artificial light. This includes mercury vapour, and both high and low pressure sodium vapour lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. sky glow).\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe ultra high contrast (UHC) LPR filter has improved contrast over the typical broadband filters. Sky background is darker, and contrast of emission nebulae are noticeably improved. The advanced technology coatings enable the filter to achieve an outstanding transmission of over 97% across the entire bandpass, with total blockage of prominent light pollution lines. The perfect filter for viewing nebula from light polluted skies, or for boosting the contrast of nebula from dark sky sites.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eIn addition to it's optimum spectral and optical characteristics, the UHC\/LPR filter offers important features that set it apart and result in the highest quality celestial views:\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe multi-layer dielectric coatings are plasma assisted and Ionbeam hardened using the latest technology for durability and resistance to scratching.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eImproved transmission translates to maximum image brightness and contrast. Users of smaller, 4\"-11\" telescopes will especially appreciate the high efficiency, and larger scope users will love the rich star fields and detailed subtle nebular shadings that are left intact.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe high transmission, sharp cutoffs, and more moderate 60nm passband of the UHC\/LPR filter retains a more natural view, yet significantly boosts overall contrast. Imagers will appreciate the broader bandpass and inclusion of an extremely efficient H-Alpha passband (656nm).\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":42102774661372,"sku":"94124","price":171.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/products\/94124_2-inch_filter_01_570x380_2x_000cf616-6b97-4885-9db0-dc7991129e84-sw.jpg?v=1645509631"},{"product_id":"televue-bandmate-1-hay-filter","title":"Tele Vue 1.25\" HB (B2H-0125)","description":"\u003cp\u003eThe distinction you'll find with Bandmate filters is their consistency, achieved by keeping control of the manufacturing and quality control processes each company does so well. All the materials are sourced in Germany. Each filter is: optically tested by TeleVue in high power-space to ensure no image degradation, tested by Astronomik on a spectrograph to ensure the coating meets design specifications, mechanically tested for fit, cosmetically inspected for pinholes, digs, and sleeks and serialized, all to insure customer satisfaction. All filters are backed with a 10-year warranty against manufacturing defects.\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe Nebustar filter is a unique narrowband design specifically for TeleVue. Unlike other UHC designs, Nebustar blocks red wavelengths normally passed by typical UHC filters. The design eliminates star bloat to produce sharper, more natural looking stars along with enhanced nebulosity. This is a great general-purpose nebula filter for scopes of any size. Astronomik is proud to deliver this exclusive filter through TeleVue and wishes that customers \"enjoy magnificent observing sessions with our most recent development for visual observers: The TeleVue Type 2 Nebustar.\"\u003cbr\u003e\u003cbr\u003eThe OIII and Hβ are more typical representative offerings available from Astronomik's product line but with the tight specification tolerances and additional assurance of TeleVue's testing guarantee.\u003cbr\u003e\u003cbr\u003eOur OIII filter passes light from doubly ionized oxygen atoms. As such, it is great for viewing planetary nebulae and supernovae remnants.\u003cbr\u003e\u003cbr\u003eThe Hβ filter passes the aqua colored hydrogen-beta emission lines found in the Horsehead, California, and other hydrogen emitting nebulae. It is effective for viewing objects that take up the entire field — even when using our wide-angle eyepieces.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/Bandmate-Nebustar_OII_HB_graph_480x480.jpg?v=1642193284\"\u003e\u003c\/p\u003e","brand":"Tele Vue Optics","offers":[{"title":"Default Title","offer_id":42102792356092,"sku":"B2H-0125","price":199.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/products\/B2H-0125_Bandmate-Type-2-HBeta_v1_3642611d-9ea7-405a-9083-3da31852700a-sw.jpg?v=1645513593"},{"product_id":"televue-bandmate-1-nebustar-filter","title":"Tele Vue 1.25\" Nebustar (B2N-0125)","description":"\u003cp\u003eThe distinction you'll find with Bandmate filters is their consistency, achieved by keeping control of the manufacturing and quality control processes each company does so well. All the materials are sourced in Germany. Each filter is: optically tested by TeleVue in high power-space to ensure no image degradation, tested by Astronomik on a spectrograph to ensure the coating meets design specifications, mechanically tested for fit, cosmetically inspected for pinholes, digs, and sleeks and serialized, all to insure customer satisfaction. All filters are backed with a 10-year warranty against manufacturing defects.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe Nebustar filter is a unique narrowband design specifically for TeleVue. Unlike other UHC designs, Nebustar blocks red wavelengths normally passed by typical UHC filters. The design eliminates star bloat to produce sharper, more natural looking stars along with enhanced nebulosity. This is a great general-purpose nebula filter for scopes of any size. Astronomik is proud to deliver this exclusive filter through TeleVue and wishes that customers \"enjoy magnificent observing sessions with our most recent development for visual observers: The TeleVue Type 2 Nebustar.\"\u003cbr\u003e\u003cbr\u003eThe OIII and Hβ are more typical representative offerings available from Astronomik's product line but with the tight specification tolerances and additional assurance of TeleVue's testing guarantee.\u003cbr\u003e\u003cbr\u003eOur OIII filter passes light from doubly ionized oxygen atoms. As such, it is great for viewing planetary nebulae and supernovae remnants.\u003cbr\u003e\u003cbr\u003eThe Hβ filter passes the aqua colored hydrogen-beta emission lines found in the Horsehead, California, and other hydrogen emitting nebulae. It is effective for viewing objects that take up the entire field — even when using our wide-angle eyepieces.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/Bandmate-Nebustar_OII_HB_graph_480x480.jpg?v=1642193284\"\u003e\u003c\/p\u003e","brand":"Tele Vue Optics","offers":[{"title":"Default Title","offer_id":42102792454396,"sku":"B2N-0125","price":203.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/products\/B2N-0200_and_B2N-0125_Bandmate-Type-2-Nebustar_66b3a380-4d96-4335-902f-39d27e4abb66-sw.jpg?v=1645513597"},{"product_id":"televue-bandmate-1-o111-filter","title":"Tele Vue 1.25\"  OIII (B2O-0125)","description":"\u003cp\u003eThe distinction you'll find with Bandmate filters is their consistency, achieved by keeping control of the manufacturing and quality control processes each company does so well. All the materials are sourced in Germany. Each filter is: optically tested by TeleVue in high power-space to ensure no image degradation, tested by Astronomik on a spectrograph to ensure the coating meets design specifications, mechanically tested for fit, cosmetically inspected for pinholes, digs, and sleeks and serialized, all to insure customer satisfaction. All filters are backed with a 10-year warranty against manufacturing defects.\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe Nebustar filter is a unique narrowband design specifically for TeleVue. Unlike other UHC designs, Nebustar blocks red wavelengths normally passed by typical UHC filters. The design eliminates star bloat to produce sharper, more natural looking stars along with enhanced nebulosity. This is a great general-purpose nebula filter for scopes of any size. Astronomik is proud to deliver this exclusive filter through TeleVue and wishes that customers \"enjoy magnificent observing sessions with our most recent development for visual observers: The TeleVue Type 2 Nebustar.\"\u003cbr\u003e\u003cbr\u003eThe OIII and Hβ are more typical representative offerings available from Astronomik's product line but with the tight specification tolerances and additional assurance of TeleVue's testing guarantee.\u003cbr\u003e\u003cbr\u003eOur OIII filter passes light from doubly ionized oxygen atoms. As such, it is great for viewing planetary nebulae and supernovae remnants.\u003cbr\u003e\u003cbr\u003eThe Hβ filter passes the aqua colored hydrogen-beta emission lines found in the Horsehead, California, and other hydrogen emitting nebulae. It is effective for viewing objects that take up the entire field — even when using our wide-angle eyepieces.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/Bandmate-Nebustar_OII_HB_graph_480x480.jpg?v=1642193284\" alt=\"\"\u003e\u003c\/p\u003e","brand":"Tele Vue Optics","offers":[{"title":"Default Title","offer_id":42102792519932,"sku":"B2O-0125","price":199.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/products\/B2O-0125_Bandmate-Type-2-OIII_v1_b25e72b8-ab49-4a57-86b4-fa0109169396-sw.jpg?v=1645513585"},{"product_id":"televue-bandmate-2-hay-filter","title":"Tele Vue 2\" HB (B2H-0200)","description":"\u003cp\u003eThe distinction you'll find with Bandmate filters is their consistency, achieved by keeping control of the manufacturing and quality control processes each company does so well. All the materials are sourced in Germany. Each filter is: optically tested by TeleVue in high power-space to ensure no image degradation, tested by Astronomik on a spectrograph to ensure the coating meets design specifications, mechanically tested for fit, cosmetically inspected for pinholes, digs, and sleeks and serialized, all to insure customer satisfaction. All filters are backed with a 10-year warranty against manufacturing defects.\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe Nebustar filter is a unique narrowband design specifically for TeleVue. Unlike other UHC designs, Nebustar blocks red wavelengths normally passed by typical UHC filters. The design eliminates star bloat to produce sharper, more natural looking stars along with enhanced nebulosity. This is a great general-purpose nebula filter for scopes of any size. Astronomik is proud to deliver this exclusive filter through TeleVue and wishes that customers \"enjoy magnificent observing sessions with our most recent development for visual observers: The TeleVue Type 2 Nebustar.\"\u003cbr\u003e\u003cbr\u003eThe OIII and Hβ are more typical representative offerings available from Astronomik's product line but with the tight specification tolerances and additional assurance of TeleVue's testing guarantee.\u003cbr\u003e\u003cbr\u003eOur OIII filter passes light from doubly ionized oxygen atoms. As such, it is great for viewing planetary nebulae and supernovae remnants.\u003cbr\u003e\u003cbr\u003eThe Hβ filter passes the aqua colored hydrogen-beta emission lines found in the Horsehead, California, and other hydrogen emitting nebulae. It is effective for viewing objects that take up the entire field — even when using our wide-angle eyepieces.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/Bandmate-Nebustar_OII_HB_graph_480x480.jpg?v=1642193284\"\u003e\u003c\/p\u003e","brand":"Tele Vue Optics","offers":[{"title":"Default Title","offer_id":42102792651004,"sku":"B2H-0200","price":363.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/products\/B2H-0200_bf11d3d5-80ef-4742-a255-bf82bb0f7ff6-sw.jpg?v=1645513679"},{"product_id":"2fs2-2-color-filters-set-of-4","title":"Antares 2\" Set Of 4 Colour Filters (2FS2)","description":"\u003cp\u003eColour filters enhance planetary imaging. Every refractive system, (lenses, correctors, eyepieces etc.) produce Chromatic Focal Shift: The different colours focus on different planes. By isolating one colour more detail will become apparent. Always use a contrasting colour to what you are observing; brightness is not an issue with planets.\u003c\/p\u003e\n\u003cp\u003eSet(4) 2\" Filters 2-#11,21,80A,ND25\u003c\/p\u003e","brand":"Sky Instruments","offers":[{"title":"Default Title","offer_id":42107134083324,"sku":"2FS2","price":108.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/products\/filter2-set-7.jpg?v=1646506499"},{"product_id":"baaderir-cut-moon-skyglow-filter","title":"Baader IR-Cut Moon \u0026 Skyglow Filter (1.25\")","description":"\u003cul\u003e\n\u003cli\u003eThe best visual and photographic filter for contrast enhancement for all telescopes, without loss of image brightness!\u003c\/li\u003e\n\u003cli\u003eThe effect of the element neodymium as filter material is very impressive. When added to optical glass, it enhances contrast, enhances the red colour in the image (especially with Mars and Jupiter) and it darkens the spectral region which is particularly marked by street lamp light, which is the biggest contributor to the nightly \"Skyglow\".\u003c\/li\u003e\n\u003cli\u003ePlanoptically polished and MC-coated – with IR-cut coatings!, without any loss of sharpness as a single filter in front of a binocular or be used for afocal projection with digital cameras (far from the focal point!)\u003c\/li\u003e\n\u003cli\u003eThe IR spectral range is blocked making stars much sharper when used with dSLRs.\u003c\/li\u003e\n\u003cli\u003eThe Baader Moon \u0026amp; Skyglow Neodymium Filter are two filters in one: Neodymium contrast enhancement filter and UV\/IR blocker.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cimg width=\"300\" src=\"https:\/\/www.baader-planetarium.com\/media\/wysiwyg\/product_info\/filter_neodymium\/125_200_neodymium_gross.jpg\" alt=\"D¼\"\u003e\n\u003cdiv\u003e1¼\" and 2\" Neodymium Lunar \u0026amp; Skyglow Filter\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp\u003eDrastic contrast enhancement for all telescopes, without loss of image brightness! This filter is initially based on a development by Carl Zeiss. The effect of the element neodymium as filter material is very impressive. If used as co-mixture to optical glass, it improves the contrast and enhances the red portions of the image (especially for Mars and Jupiter). At night it blocks that part of the spectrum, which suffers most from street lighting – and it blocks the light pollution, also known as „skyglow“. And lastly, the applied UV\/IR blocking coating (Luminance-coating - check the spectral trace) cuts all unwanted UV below 400 nm and NIR above 700 nm - this makes it the „sharpest contrast enhancing filter“ for imaging.\u003c\/p\u003e\n\u003cp\u003eCompare with the moon \u0026amp; Skyglow filter before the naked eye, to test the effectiveness. Red and blue colours are extensively strengthened. If you cannot see the GRS (Great Red Spot) due to pollution try this which will allow you to see it.\u003c\/p\u003e\n\u003cp\u003eIn order to establish a precise plan area and to maintain the planarity despite the applied forces through the different layers of coating, a high technical effort is necessary. You have to choose from a large amount of raw glass only the best pieces in tension-free annealed quality to even hope for a good final quality may. All too easily, the glass deforms with improper preparation or coating on older evaporation systems. The final product is almost useless, if not greatest of care is taken at every stage of production.\u003c\/p\u003e\n\u003ch4\u003eSURFACE DETAILS ON MARS, JUPITER AND MOON AS WELL AS MANY DEEP-SKY-OBJECTS BECOME MUCH MORE PROMINENT.\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSelective contrast filter, especially suitable for all reflector telescopes\u003c\/li\u003e\n\u003cli\u003eFilters out specific wavelengths, especially those caused by streetlight and most importantly their scattered light which lightens up the night sky\u003c\/li\u003e\n\u003cli\u003eSelective blocking retains natural colours intact but with RGB significantly enhanced, differences in colour and brightness persist.\u003c\/li\u003e\n\u003cli\u003e95% transmission in the selected spectral range.\u003c\/li\u003e\n\u003cli\u003eFits all standard filter threads and can be combined with other filters – e.g. the planeoptically\u003cbr\u003epolished (!) Baader planetary colour filters. This way, you can see fine details better or combine several images with a monochrome camera to achieve colour images.\u003c\/li\u003e\n\u003cli\u003eThe filter is at the same time optimised for Astrophotography due to it‘s full UV\/IR-blocking coating. When used with DSLRs, stars will remain much tighter, because the unfocussed UV and IR parts of the spectrum are blocked out.\u003c\/li\u003e\n\u003cli\u003ePlaneoptically polished; can be used without problems in front of a binoviewer or for afocal photography – far away from the focus without loosing sharpness!\u003c\/li\u003e\n\u003cli\u003eThe fine-optical polish and absence of wedge error in the glass ensure perfect sharpness when magnifying more than 200x - while the much cheaper “fire -polished” filter glasses destroy the optical wavefront at high mags\u003c\/li\u003e\n\u003cli\u003eNeodymium doped optical glass\u003c\/li\u003e\n\u003cli\u003eCoatings Front\/Back: 7-layer hard-BBAR-coating \/ 27-layered dielectrical UV\/IR-cut coating\u003c\/li\u003e\n\u003cli\u003eUltra-hard and durable Ion-beam hardened coatings – may be cleaned anytime without fear\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch3\u003eSpectral Curve of the Moon \u0026amp; Skyglow Filter\u003c\/h3\u003e\n\u003cdiv\u003e\n\u003ca href=\"https:\/\/www.baader-planetarium.com\/media\/wysiwyg\/product_info\/filter_neodymium\/moon-skyglow-wavelength.jpg\" target=\"_blank\"\u003e\u003cimg width=\"250\" src=\"https:\/\/www.baader-planetarium.com\/media\/wysiwyg\/product_info\/filter_neodymium\/moon-skyglow-wavelength.jpg\" alt=\"Spectral curve of Moon \u0026amp; Skyglow Filter\"\u003e\u003c\/a\u003e\n\u003cdiv\u003eSpectral curve of the Moon \u0026amp; Skyglow filter\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eThe adjacent graph shows you the spectral curve of our Neodymium Moon \u0026amp; Skyglow filters. On the horizontal axis, the wavelength in nanometers, and the vertical axis is the transmission amount (opacity) specified in percent.\u003c\/p\u003e\n\u003cp\u003eThe area under the curve is the spectral range that can pass through the filter.\u003c\/p\u003e\n\u003cp\u003eImportant note: Before you buy a \"Moon and Skyglow\" filter, which is now available from several manufacturers, compare the transmission curves! You will find that the original \"Baader Moon\u0026amp;Skyglow\" filter has the highest transmission and is blocked in the UV\/IR, with the same layer system as a Baader L filter. This means sharper images because only the spectral range where the telescope can deliver a sharp image, reaches the chip. In addition, our filter is plano-optically polished.  Only few manufacturers are willing to do this, only because of this the filter is also suitable for the highest magnifications.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":42107135328508,"sku":"2458305A","price":130.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/products\/baader-neodymium-1-1-4-moon-skyglow-filter-7f0_1024x1024_jpg.webp?v=1655505825"},{"product_id":"tele-vue-2-nebustar-b2n-200","title":"Tele Vue 2\" Nebustar (B2N-0200)","description":"\u003cp\u003eThe distinction you'll find with Bandmate filters is their consistency, achieved by keeping control of the manufacturing and quality control processes each company does so well. All the materials are sourced in Germany. Each filter is: optically tested by TeleVue in high power-space to ensure no image degradation, tested by Astronomik on a spectrograph to ensure the coating meets design specifications, mechanically tested for fit, cosmetically inspected for pinholes, digs, and sleeks and serialized, all to insure customer satisfaction. All filters are backed with a 10-year warranty against manufacturing defects.\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe Nebustar filter is a unique narrowband design specifically for TeleVue. Unlike other UHC designs, Nebustar blocks red wavelengths normally passed by typical UHC filters. The design eliminates star bloat to produce sharper, more natural looking stars along with enhanced nebulosity. This is a great general-purpose nebula filter for scopes of any size. Astronomik is proud to deliver this exclusive filter through TeleVue and wishes that customers \"enjoy magnificent observing sessions with our most recent development for visual observers: The TeleVue Type 2 Nebustar.\"\u003cbr\u003e\u003cbr\u003eThe OIII and Hβ are more typical representative offerings available from Astronomik's product line but with the tight specification tolerances and additional assurance of TeleVue's testing guarantee.\u003cbr\u003e\u003cbr\u003eOur OIII filter passes light from doubly ionized oxygen atoms. As such, it is great for viewing planetary nebulae and supernovae remnants.\u003cbr\u003e\u003cbr\u003eThe Hβ filter passes the aqua colored hydrogen-beta emission lines found in the Horsehead, California, and other hydrogen emitting nebulae. It is effective for viewing objects that take up the entire field — even when using our wide-angle eyepieces.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/Bandmate-Nebustar_OII_HB_graph_480x480.jpg?v=1642193284\"\u003e\u003c\/p\u003e","brand":"Tele Vue Optics","offers":[{"title":"Default Title","offer_id":42421489467644,"sku":"B2N-0200","price":450.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/products\/B2N-0200_Bandmate-Type-2-Nebustar_v1-sw.jpg?v=1645513683"},{"product_id":"tele-vue-2-oiii-b2o-0200","title":"Tele Vue 2\" OIII (B2O-0200)","description":"\u003cp\u003eThe distinction you'll find with Bandmate filters is their consistency, achieved by keeping control of the manufacturing and quality control processes each company does so well. All the materials are sourced in Germany. Each filter is: optically tested by TeleVue in high power-space to ensure no image degradation, tested by Astronomik on a spectrograph to ensure the coating meets design specifications, mechanically tested for fit, cosmetically inspected for pinholes, digs, and sleeks and serialized, all to insure customer satisfaction. All filters are backed with a 10-year warranty against manufacturing defects.\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe Nebustar filter is a unique narrowband design specifically for TeleVue. Unlike other UHC designs, Nebustar blocks red wavelengths normally passed by typical UHC filters. The design eliminates star bloat to produce sharper, more natural looking stars along with enhanced nebulosity. This is a great general-purpose nebula filter for scopes of any size. Astronomik is proud to deliver this exclusive filter through TeleVue and wishes that customers \"enjoy magnificent observing sessions with our most recent development for visual observers: The TeleVue Type 2 Nebustar.\"\u003cbr\u003e\u003cbr\u003eThe OIII and Hβ are more typical representative offerings available from Astronomik's product line but with the tight specification tolerances and additional assurance of TeleVue's testing guarantee.\u003cbr\u003e\u003cbr\u003eOur OIII filter passes light from doubly ionized oxygen atoms. As such, it is great for viewing planetary nebulae and supernovae remnants.\u003cbr\u003e\u003cbr\u003eThe Hβ filter passes the aqua colored hydrogen-beta emission lines found in the Horsehead, California, and other hydrogen emitting nebulae. It is effective for viewing objects that take up the entire field — even when using our wide-angle eyepieces.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/Bandmate-Nebustar_OII_HB_graph_480x480.jpg?v=1642193284\"\u003e\u003c\/p\u003e","brand":"Tele Vue Optics","offers":[{"title":"Default Title","offer_id":42421497430268,"sku":"B2O-0200","price":363.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/products\/B2O-0200_Bandmate-Type-2-OIII_v1-sw.jpg?v=1645513688"},{"product_id":"optolong-cls-city-light-suppression-broadband-filter-1-25-opt-cls-125","title":"Optolong CLS (City Light Suppression) Broadband Filter 1.25\" Mounted (OPT-CLS-125)","description":"\u003cp\u003eThe CLS (City Light Suppression) broadband filter is designed to improve the visibility of various deep sky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapour lamps, both high \u0026amp; low pressure sodium vapour lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm), H-alpha(656nm) as well as SII(672nm), the filter is suitable for enhancing the contrast and details for both visual and photographic purpose at sub-rural area.\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eSuitable for colour CCD cameras and unmodified DSLRs.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eCLS with wider pass-band than UHC and hence is more favored when observing under mild to moderate light pollution.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eLight pollution filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eWARNING: The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. You would be BLIND if you fail to observe the warning.\u003cbr\u003e\u003c\/p\u003e\n\u003ch4\u003eOptolong CLS Spectrum and Characteristic\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSubstrate: Optical glass\u003c\/li\u003e\n\u003cli\u003eThickness: 1.85mm\u003c\/li\u003e\n\u003cli\u003eTave: T\u0026gt;90%\u003c\/li\u003e\n\u003cli\u003eBlocking range: 400-700nm\u003c\/li\u003e\n\u003cli\u003eBlocking depth: light pollution line blocking \u0026gt;99%\u003c\/li\u003e\n\u003cli\u003eSurface quality: 60\/40\u003c\/li\u003e\n\u003cli\u003eTransmitted Wavefront RMS: λ\/4\u003c\/li\u003e\n\u003cli\u003eParallelism: 30s\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCoating Technology\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eMulti-layers anti-reflection coating\u003c\/li\u003e\n\u003cli\u003eNon-cementing optical substrate coating\u003c\/li\u003e\n\u003cli\u003eOptolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/li\u003e\n\u003cli\u003ePlanetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eWarm Prompt\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAbout colour: due to the influence of ambient light, colour difference of the display and flash photography, the colour of the product may have some colour difference. Detailed colour is in accordance with the final product.\u003c\/li\u003e\n\u003cli\u003eAbout coating: the interference filter will show different colours under different light, which is a normal phenomenon. Please refer to the material object.\u003c\/li\u003e\n\u003cli\u003eAbout the style: in order to improve the product, the change of design\/appearance\/parameters has not been updated in time. Please see the subject produce.\u003c\/li\u003e\n\u003cli\u003eAbout the description: the series of this product have the same material, technology and design, different sizes only, please note.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat's in the Box\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOuter Box: sliver box\u003c\/li\u003e\n\u003cli\u003ePlastic Box: PP material\u003c\/li\u003e\n\u003cli\u003eLining: imported high pressure white EVA material\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003c\/h2\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":42548481294588,"sku":"AS100197","price":76.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/products\/08d02ea6a6dd0571db2f3ebde94e9da9-sw.jpg?v=1645510392"},{"product_id":"optolong-cls-city-light-suppression-broadband-filter-2-opt-cls-2","title":"Optolong CLS (City Light Suppression) Broadband Filter 2\" Mounted (OPT-CLS-2)","description":"\u003cp\u003eThe CLS (City Light Suppression) broadband filter is designed to improve the visibility of various deep sky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapour lamps, both high \u0026amp; low pressure sodium vapour lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm), H-alpha(656nm) as well as SII(672nm), the filter is suitable for enhancing the contrast and details for both visual and photographic purpose at sub-rural area.\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eSuitable for colour CCD cameras and unmodified DSLRs.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eCLS with wider pass-band than UHC and hence is more favoured when observing under mild to moderate light pollution.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eLight pollution filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eWARNING: The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. You would be BLIND if you fail to observe the warning.\u003cbr\u003e\u003c\/p\u003e\n\u003ch4\u003eOptolong CLS Spectrum and Characteristic\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSubstrate: Optical glass\u003c\/li\u003e\n\u003cli\u003eThickness: 1.85mm\u003c\/li\u003e\n\u003cli\u003eTave: T\u0026gt;90%\u003c\/li\u003e\n\u003cli\u003eBlocking range: 400-700nm\u003c\/li\u003e\n\u003cli\u003eBlocking depth: light pollution line blocking \u0026gt;99%\u003c\/li\u003e\n\u003cli\u003eSurface quality: 60\/40\u003c\/li\u003e\n\u003cli\u003eTransmitted Wavefront RMS: λ\/4\u003c\/li\u003e\n\u003cli\u003eParallelism: 30s\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCoating Technology\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eMulti-layers anti-reflection coating\u003c\/li\u003e\n\u003cli\u003eNon-cementing optical substrate coating\u003c\/li\u003e\n\u003cli\u003eOptolong filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/li\u003e\n\u003cli\u003ePlanetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eWarm Prompt\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eAbout colour: due to the influence of ambient light, colour difference of the display and flash photography, the colour of the product may have some colour difference. Detailed colour is in accordance with the final product.\u003c\/li\u003e\n\u003cli\u003eAbout coating: the interference filter will show different colours under different light, which is a normal phenomenon. Please refer to the material object.\u003c\/li\u003e\n\u003cli\u003eAbout the style: in order to improve the product, the change of design\/appearance\/parameters has not been updated in time. Please see the subject produce.\u003c\/li\u003e\n\u003cli\u003eAbout the description: the series of this product have the same material, technology and design, different sizes only, please note.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat's in the Box\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOuter Box: sliver box\u003c\/li\u003e\n\u003cli\u003ePlastic Box: PP material\u003c\/li\u003e\n\u003cli\u003eLining: imported high pressure white EVA material\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003c\/h2\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":42548482244860,"sku":"AS100198","price":118.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/products\/08d02ea6a6dd0571db2f3ebde94e9da9_aa0a60ac-bb2e-462c-a850-8fd375fe3bf4-sw.jpg?v=1645510414"},{"product_id":"optolong-uhc-light-pollution-filter-1-25-opt-uhc-125","title":"Optolong UHC Light Pollution Filter 1.25\" Mounted (OPT-UHC-125)","description":"\u003cp\u003eThe UHC (Ultra High Contrast) broadband filter is designed to improve the visibility of various deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapour lamps, both high \u0026amp; low pressure sodium vapour lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm), H-alpha(656nm) as well as SII(672nm), the filter is suitable for enhancing the contrast and details for both visual and photographic purpose at sub-rural area with heavy light pollution.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSuitable for colour CCD cameras and unmodified DSLRs.\u003c\/li\u003e\n\u003cli\u003eUHC with narrower passband provides higher contrast than CLS. Thus it is more suitable for urban environment where you suffer from severe light pollution.\u003c\/li\u003e\n\u003cli\u003eUHC has a substantial red passband and offer superb views for objects like the Orion Nebula (M42).\u003c\/li\u003e\n\u003cli\u003eLight pollution filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWARNING: The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. You would be BLIND if you fail to observe the warning.\u003c\/p\u003e\n\u003ch4\u003eOptolong CLS Spectrum and Characteristic\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSubstrate: optical glass\u003c\/li\u003e\n\u003cli\u003eTave\u0026gt;95%\u003c\/li\u003e\n\u003cli\u003eBlocking range: 300-700nm\u003c\/li\u003e\n\u003cli\u003eBlocking depth: OD3, light pollution line blocking \u0026gt;99%\u003c\/li\u003e\n\u003cli\u003eSurface quality: 60\/40 (Refer to MIL-O-13830A, MIL-C-48497A)\u003c\/li\u003e\n\u003cli\u003eTransmitted Wavefront RMS: ¼ λ\u003c\/li\u003e\n\u003cli\u003eParallelism: 30s\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCoating Technology\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eMulti-layers anti-reflection coating\u003c\/li\u003e\n\u003cli\u003eNon-cementing optical substrate coating\u003c\/li\u003e\n\u003cli\u003eOptolong L-Pro filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/li\u003e\n\u003cli\u003ePlanetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOuter Box: sliver box\u003c\/li\u003e\n\u003cli\u003ePlastic Box: PP material\u003c\/li\u003e\n\u003cli\u003eLining: imported high pressure white EVA material\u003c\/li\u003e\n  \u003cli\u003eUHC Light Pollution Filter\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":42548624589052,"sku":"AS100001","price":76.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/products\/65c523e8574077d44763caf8b2301ffe-sw.jpg?v=1645511090"},{"product_id":"optolong-uhc-light-pollution-filter-2-opt-uhc-2","title":"Optolong UHC Light Pollution Filter 2\" Mounted (OPT-UHC-2)","description":"\u003cp\u003eThe UHC (Ultra High Contrast) broadband filter is designed to improve the visibility of various deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high \u0026amp; low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm), H-alpha(656nm) as well as SII(672nm), the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution.\u003cbr\u003e\u003c\/p\u003e\n\n\u003cp\u003eSuitable for colour CCD cameras and unmodified DSLRs.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eUHC with narrower passband provides higher contrast than CLS. Thus it is more suitable for urban environment where you suffer from severe light pollution.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eUHC has a substantial red passband and offer superb views for objects like the Orion Nebula (M42).\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eLight pollution filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eWARNING: The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. You would be BLIND if you fail to observe the warning.\u003c\/p\u003e\n\u003ch4\u003eOptolong CLS Spectrum and Characteristic\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSubstrate: optical glass\u003c\/li\u003e\n\u003cli\u003eTave\u0026gt;95%\u003c\/li\u003e\n\u003cli\u003eBlocking range: 300-700nm\u003c\/li\u003e\n\u003cli\u003eBlocking depth: OD3, light pollution line blocking \u0026gt;99%\u003c\/li\u003e\n\u003cli\u003eSurface quality: 60\/40 (Refer to MIL-O-13830A, MIL-C-48497A)\u003c\/li\u003e\n\u003cli\u003eTransmitted Wavefront RMS: ¼ λ\u003c\/li\u003e\n\u003cli\u003eParallelism: 30s\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCoating Technology\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eMulti-layers anti-reflection coating\u003c\/li\u003e\n\u003cli\u003eNon-cementing optical substrate coating\u003c\/li\u003e\n\u003cli\u003eOptolong L-Pro filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/li\u003e\n\u003cli\u003ePlanetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003ch3\u003eWhat's in the Box\u003cbr\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOuter Box: sliver box\u003c\/li\u003e\n\u003cli\u003ePlastic Box: PP material\u003c\/li\u003e\n\u003cli\u003eLining: imported high pressure white EVA material\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003c\/h2\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":42548662665468,"sku":"AS100002","price":118.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/products\/65c523e8574077d44763caf8b2301ffe_e2e9fe5e-87e1-4401-9e09-cf56a73dfbec-sw.jpg?v=1645511115"},{"product_id":"baader-ir-cut-moon-skyglow-filter-2","title":"Baader IR-Cut Moon \u0026 Skyglow Filter 2\" (FMS-2)","description":"\u003cul\u003e\n\u003cli\u003eThe best visual and photographic filter for contrast enhancement for all telescopes, without loss of image brightness!\u003c\/li\u003e\n\u003cli\u003eThe effect of the element neodymium as filter material is very impressive. When added to optical glass, it enhances contrast, enhances the red colour in the image (especially with Mars and Jupiter) and it darkens the spectral region which is particularly marked by street lamp light, which is the biggest contributor to the nightly \"Skyglow\".\u003c\/li\u003e\n\u003cli\u003ePlanoptically polished and MC-coated – with IR-cut coatings!, without any loss of sharpness as a single filter in front of a binocular or be used for afocal projection with digital cameras (far from the focal point!)\u003c\/li\u003e\n\u003cli\u003eThe IR spectral range is blocked making stars much sharper when used with dSLRs.\u003c\/li\u003e\n\u003cli\u003eThe Baader Moon \u0026amp; Skyglow Neodymium Filter are two filters in one: Neodymium contrast enhancement filter and UV\/IR blocker.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e1¼\" and 2\" Neodymium Lunar \u0026amp; Skyglow Filter\u003c\/div\u003e\n\u003cdiv\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp\u003eDrastic contrast enhancement for all telescopes, without loss of image brightness! This filter is initially based on a development by Carl Zeiss. The effect of the element neodymium as filter material is very impressive. If used as co-mixture to optical glass, it improves the contrast and enhances the red portions of the image (especially for Mars and Jupiter). At night it blocks that part of the spectrum, which suffers most from street lighting – and it blocks the light pollution, also known as „skyglow“. And lastly, the applied UV\/IR blocking coating (Luminance-coating - check the spectral trace) cuts all unwanted UV below 400 nm and NIR above 700 nm - this makes it the „sharpest contrast enhancing filter“ for imaging.\u003c\/p\u003e\n\u003cp\u003eCompare with the moon \u0026amp; Skyglow filter before the naked eye, to test the effectiveness. Red and blue colours are extensively strengthened. If you cannot see the GRS (Great Red Spot) due to pollution try this which will allow you to see it.\u003c\/p\u003e\n\u003cp\u003eIn order to establish a precise plan area and to maintain the planarity despite the applied forces through the different layers of coating, a high technical effort is necessary. You have to choose from a large amount of raw glass only the best pieces in tension-free annealed quality to even hope for a good final quality may. All too easily, the glass deforms with improper preparation or coating on older evaporation systems. The final product is almost useless, if not greatest of care is taken at every stage of production.\u003c\/p\u003e\n\u003ch4\u003eSURFACE DETAILS ON MARS, JUPITER AND MOON AS WELL AS MANY DEEP-SKY-OBJECTS BECOME MUCH MORE PROMINENT.\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSelective contrast filter, especially suitable for all reflector telescopes\u003c\/li\u003e\n\u003cli\u003eFilters out specific wavelengths, especially those caused by streetlight and most importantly their scattered light which lightens up the night sky\u003c\/li\u003e\n\u003cli\u003eSelective blocking retains natural colours intact but with RGB significantly enhanced, differences in colour and brightness persist.\u003c\/li\u003e\n\u003cli\u003e95% transmission in the selected spectral range.\u003c\/li\u003e\n\u003cli\u003eFits all standard filter threads and can be combined with other filters – e.g. the planeoptically\u003cbr\u003epolished (!) Baader planetary colour filters. This way, you can see fine details better or combine several images with a monochrome camera to achieve colour images.\u003c\/li\u003e\n\u003cli\u003eThe filter is at the same time optimised for Astrophotography due to it‘s full UV\/IR-blocking coating. When used with DSLRs, stars will remain much tighter, because the unfocussed UV and IR parts of the spectrum are blocked out.\u003c\/li\u003e\n\u003cli\u003ePlaneoptically polished; can be used without problems in front of a binoviewer or for afocal photography – far away from the focus without loosing sharpness!\u003c\/li\u003e\n\u003cli\u003eThe fine-optical polish and absence of wedge error in the glass ensure perfect sharpness when magnifying more than 200x - while the much cheaper “fire -polished” filter glasses destroy the optical wavefront at high mags\u003c\/li\u003e\n\u003cli\u003eNeodymium doped optical glass\u003c\/li\u003e\n\u003cli\u003eCoatings Front\/Back: 7-layer hard-BBAR-coating \/ 27-layered dielectrical UV\/IR-cut coating\u003c\/li\u003e\n\u003cli\u003eUltra-hard and durable Ion-beam hardened coatings – may be cleaned anytime without fear\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003ch3\u003eSpectral Curve of the Moon \u0026amp; Skyglow Filter\u003c\/h3\u003e\n\u003cdiv\u003e\n\u003cdiv\u003eSpectral curve of the Moon \u0026amp; Skyglow filter\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eThe adjacent graph shows you the spectral curve of our Neodymium Moon \u0026amp; Skyglow filters. On the horizontal axis, the wavelength in nanometers, and the vertical axis is the transmission amount (opacity) specified in percent.\u003c\/p\u003e\n\u003cp\u003eThe area under the curve is the spectral range that can pass through the filter.\u003c\/p\u003e\n\u003cp\u003eImportant note: Before you buy a \"Moon and Skyglow\" filter, which is now available from several manufacturers, compare the transmission curves! You will find that the original \"Baader Moon\u0026amp;Skyglow\" filter has the highest transmission and is blocked in the UV\/IR, with the same layer system as a Baader L filter. This means sharper images because only the spectral range where the telescope can deliver a sharp image, reaches the chip. In addition, our filter is plano-optically polished.  Only few manufacturers are willing to do this, only because of this the filter is also suitable for the highest magnifications.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Baader Planetarium","offers":[{"title":"Default Title","offer_id":43509324415228,"sku":"2458334A","price":213.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/products\/baader-neodymium-1-1-4-moon-skyglow-filter-7f0_1024x1024_jpg.jpg?v=1659657680"},{"product_id":"antares-1-25-color-filters-set-of-4-fs2","title":"Antares 1.25\" Color Filters, Set of 4 (FS2)","description":"\u003cp\u003eSet of 4 1.25\" color filters (#11, #21, #80A, ND25), to enhance planetary imaging.\u003c\/p\u003e\n\u003cp\u003eEvery refractive system, (lenses, correctors, eyepieces, etc.) produce Chromatic Focal Shift: The different colors focus on different planes. By isolating one color more detail will become apparent.\u003c\/p\u003e\n\u003cp\u003eAlways use a contrasting color to what you are observing.\u003c\/p\u003e","brand":"Sky Instruments","offers":[{"title":"Default Title","offer_id":43519541641468,"sku":"FS2","price":69.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/fs2.png?v=1720144291"},{"product_id":"antlia-1-25-h-beta-and-oiii-visual-and-photography-filter-ant-hb-oiii-125","title":"Antlia 1.25\" H-Beta and OIII Visual and Photography Filter (ANT-HB-OIII-125)","description":"\u003cp\u003eAntlia HB-OIII filter is engineered specifically for night visual nebulae observation at a high contrast and Deep-sky astrophotography. Its transmission is 90% or greater at critical wavelengths (OIII 500.7nm, OIII 495.9nm, and H-Beta 486.1nm). You’ll notice much higher contrast boost to observe Planetary Nebula, Supernova Remnant, Emission Nebula, Diffuse Nebula, and extremely faint nebulae by Antlia HB-OIII filter.\u003c\/p\u003e\n\u003cp\u003eWhen it is used for Astro Deep-sky imaging, it enhances the details of the OIII and H-Beta emission lines with astronomical cameras and DSLRs.\u003c\/p\u003e\n\u003cp\u003eAntlia HB-OIII filter was coated with almost total suppression of optical density (OD)4 on unwanted wavelength and the filter cut-off wavelength is 300-1000nm, which meets the spectral requirements of photographic cameras and further enhances the suppression of the IR region, compared with the visual filters with a cut-off depth of OD3@350-750nm, it performs better to darken the sky background and make deep-sky observation and photography of nebulae, star clusters, and galaxies more easily.\u003c\/p\u003e\n\u003cp\u003eThe HB-OIII filter helps faint objects become much more visible against the blackened background and produces near-photographic views of the Veil, Dumbbell, and Orion nebula, among many other objects under both light-polluted and dark skies.\u003c\/p\u003e\n\u003cp\u003eSince human eyes are less sensitive at night, large aperture telescopes are recommended to gather light and funnel it into the observer's eyes.\u003c\/p\u003e\n\u003cp\u003eImportant Note: These filters are NOT designed for observing or photographing the Sun. DO NOT use these filters to observe or photograph the Sun. If you do it will result in permanent eye damage!\u003c\/p\u003e\n\u003ch3\u003eTransmission Chart \u0026amp; Notes\u003c\/h3\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/antlia_hb_oiii_transmission_curve_480x480.png?v=1684707545\" alt=\"\"\u003e\n\u003cul\u003e\n\u003cli\u003ePurple Line - Represents the transmission curve of the filter.\u003c\/li\u003e\n\u003cli\u003eThe Major Emission Lines of Nebulae: H-α (656.3nm), H-β (486.1nm), OIII (495.9nm) and OIII (500.7nm)\u003c\/li\u003e\n\u003cli\u003eThe Major Emission Lines of Artificial Light Pollution: Hg \/ Mercury (435.8nm, 546.1nm, 577nm and 578.1nm), Na \/ Sodium (598nm, 589.6nm, 615.4nm and 616.1nm)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eOxygen III\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eOxygen III\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eH-Beta\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCWL (Central Wavelength)\u003c\/td\u003e\n\u003ctd\u003e500.7 nm\u003c\/td\u003e\n\u003ctd\u003e495.9 nm\u003c\/td\u003e\n\u003ctd\u003e486.1 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak Transmission\u003c\/td\u003e\n\u003ctd\u003e \u0026gt; 90%\u003c\/td\u003e\n\u003ctd\u003e \u0026gt; 90%\u003c\/td\u003e\n\u003ctd\u003e \u0026gt; 90%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003eOD4@ 300-1000nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Thickness\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003e2mm +\/- 0.05mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBasic Substrate\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003eOptical, Single, Non-glued substrate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface Quality\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003eS\/D (scratch\/dig) = 60\/40  (Refer to MIL-O-13830)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmitted Wavefront\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003eLambda\/4 or better\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eParallelism\u003c\/td\u003e\n\u003ctd colspan=\"3\"\u003eLess than 30 arcsec\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":43748948312316,"sku":"ANT-HB-OIII-125","price":133.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/products\/antlia_hb_oiii_1.jpg?v=1663632611"},{"product_id":"baader-contrast-booster-filter-2458360-2458365","title":"Baader Planetarium Contrast Booster Filter 1.25\" \u0026 2\" (2458360\/2458365)","description":"\u003cp\u003eDiscover your telescope anew – with the Baader Contrast Booster: Planeoptically Polished and Phantom Group Coated\u003c\/p\u003e\n\u003cp\u003eA unique filter for many different astronomical tasks – incomparable in acuity to combinations of generic colour filters, made of raw polished glass – where surface inaccuracy adds up in the optical wave front to an unbearable degree. Especially designed to improve the beginners telescopes – to provide a professional replacement for the simple \"dark green\" Moon \u0026amp; Solar-Filters made of \"raw polished\" glass.\u003c\/p\u003e\n\u003cp\u003eNote: For Solar Observation use only in combination with Baader AstroSolar Safety Film!\u003c\/p\u003e\n\u003ch4\u003eThe Transmission Line Of Baader Contrast Booster\u003c\/h4\u003e\n\u003cp\u003eThe transmission curve shows the light transmittance in percent versus the light wavelength in nanometres. Note the high transmission for visual observations of H-Alpha (98%), H-Beta (87%) and OIII (82%).\u003c\/p\u003e\n\u003cp\u003eIn a light polluted town or city mercury and sodium vapour street lights emit at 435nm and between 570-590nm. Here the filter transmission is between 0.3 and 3%.\u003c\/p\u003e\n\u003cp\u003eThe Baader Contrast Booster with integrated UV \/ IR cut filter is both an optimal filter for visual observations as well as for CCD images from light-polluted big city and metropolitan area.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEliminates the colour error of economy refractors.\u003c\/li\u003e\n\u003cli\u003eClearly puts the real quality of the lens on display.\u003c\/li\u003e\n\u003cli\u003eRemoves the bluish \"hue\" (=lack of contrast) during lunar-, planetary-, solar- and terrestrial observation.\u003c\/li\u003e\n\u003cli\u003eStrongly emphasizes surface detail on Jupiter and Mars. If you have never seen the GRS (Great Red Spot) on Jupiter – with this filter you will.\u003c\/li\u003e\n\u003cli\u003eOver 95 % transmission – provides a bright, brilliant image compared to the usual dark green colour filters, used to bring out detail on Jupiter. Colour recognition will be retained.\u003c\/li\u003e\n\u003cli\u003eThe ultimate in lunar filters. Moon (and Sun) appear much more natural in color (with a slight yellowish tint), compared to the usual low priced dark green Moon-filters, usually offered for beginners telescopes.\u003c\/li\u003e\n\u003cli\u003eCompletely removes distracting false colour and the resulting smeared and washed out image details. You have never ever seen the Moon or the Sun (with AstroSolar Safety Film) so tack sharp in an economy priced telescope.\u003c\/li\u003e\n\u003cli\u003eBlocks atmospheric \"stray light\" (skyglow). Sky background turns into pitch black.\u003c\/li\u003e\n\u003cli\u003eFits into standard filter threads. Filter thread on both sides, so it can be stacked with other filters\u003c\/li\u003e\n\u003cli\u003eIncludes UV\/IR-cut-filter to remove unsharp stars caused by unfocussed infrared light on images taken with red-sensitive digital cameras.\u003c\/li\u003e\n\u003cli\u003ePlaneoptically polished, suitable for being used in front of a binocular viewer, or for a-focal image projection during digital imaging (way in front of the focal plane).\u003c\/li\u003e\n\u003cli\u003eNo deterioration of resolution with magnifications of 200x and more – as with \"raw polished\" (flame polished) glass.\u003c\/li\u003e\n\u003cli\u003eSubstrate (glass melt) Neodymium doped glass.\u003c\/li\u003e\n\u003cli\u003eCoating \/ rear face: 7-layer hard-multicoating, featuring 0.25% reflection.\u003c\/li\u003e\n\u003cli\u003eCoating \/ front face: 23-layer dielectric long pass blocker.\u003c\/li\u003e\n\u003cli\u003eIon beam hardened coatings on both faces, absolutely scratch resistant – may be cleaned any time without fear with Baader Optical Wonder Fluid.\u003c\/li\u003e\n\u003cli\u003eA significant part of city light air pollution, as well as atmospheric Airglow is removed from the telescopic image.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight (Kg)\u003c\/td\u003e\n\u003ctd\u003e0.01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Range\u003c\/td\u003e\n\u003ctd\u003emultiple bands (see spectral image)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Thickness (without Cell)\u003c\/td\u003e\n\u003ctd\u003e1 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAR-Coating\u003c\/td\u003e\n\u003ctd\u003ePhantom Coating® Group, planeoptically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Size\u003c\/td\u003e\n\u003ctd\u003e1.25 and 2 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Usage\u003c\/td\u003e\n\u003ctd\u003eContrast Enhancement, Color Correction, IR-Cut, Planetary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Mounted\u003c\/td\u003e\n\u003ctd\u003eMounted (LPFC 6mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTyor of Filter\u003c\/td\u003e\n\u003ctd\u003eBandpass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSingle or Set\u003c\/td\u003e\n\u003ctd\u003eSingle Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Shape\u003c\/td\u003e\n\u003ctd\u003eRound\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Baader Planetarium","offers":[{"title":"1.25\"","offer_id":43787917197564,"sku":"2458360","price":130.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":43787917230332,"sku":"2458365","price":209.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/products\/baader-contrast-booster-filter-92b.jpg?v=1664426451"},{"product_id":"astronomik-1-25-2-ultra-high-contrast-filters-ask-uhc","title":"Astronomik 1.25\"\/2\" Ultra-High Contrast Filters (ASK-UHC)","description":"\u003cp\u003eYou will enjoy using your Astronomik UHC filter because you will see more stars and more details in deep-sky-objects compared to using filters from all other manufacturers.\u003c\/p\u003e\n\u003cp\u003eThe Astronomik UHC (Ultra High Contrast) filter allows the transmission of nearly 100% of the radiation from both O-III and the H beta lines. Though the second window for the H-alpha-line is not intended for visual observing, it is important, if the filter is used with an electronic device. All annoying, scattered light from other wavelength sources, including local artificial light pollution, is reliably filtered out. With this strong blocking of the sky background an unexpected wealth of detail becomes visible for gas nebulae and planetary nebulae.\u003c\/p\u003e\n\u003ch4\u003eMain use\u003c\/h4\u003e\n\u003cp\u003eAstronomik UHC filters’ astounding high light transmission brings better views of deep-sky-objects even to small telescopes! The high transmission of our optical glass filters means that enough light is available to allow successful visual observations with telescopes beginning at 2\" (50mm) aperture. Our Astronomik filters are optimized for use with telescope focal length f \/ ratios of f\/4 to f\/15. Transmission losses and chromatic distortions, which arise with other filters, only occur with Astronomik filters when extremely bright aperture ratios of 1:2 and more come into play. Another major advantage of our Astronomik UHC filter is the high optical quality of the filter glass. When using Astronomik UHC filters you will quickly notice the same needle-sharp stars which you are familiar with from your astronomical instrument without any filter!\u003c\/p\u003e\n\u003ch3\u003eSuitability\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVisual observation (dark skies): Very good, for telescopes of all apertures and high exit pupil\u003c\/li\u003e\n\u003cli\u003eVisual observation (urban skies): Very good, for telescops from 100 mm aperture\u003c\/li\u003e\n\u003cli\u003eFilm photography: Reasonable, but very long exposure time\u003c\/li\u003e\n\u003cli\u003eCCD photography: Good, when used with an additional IR-block-filter\u003c\/li\u003e\n\u003cli\u003eDSLR photography (original): Good, colour balance shifted but contrast enhanced\u003c\/li\u003e\n\u003cli\u003eDSLR photography (astro modified): Very good, colour balance is near perfect\u003c\/li\u003e\n\u003cli\u003eDSLR photography (MC modified): Good, when used with an additional IR-block-filter\u003c\/li\u003e\n\u003cli\u003eWebcam \/ Video (Planets): Unsuitable\u003c\/li\u003e\n\u003cli\u003eWebcam \/ Video (Deep Sky): Good, if light pollution is a big problem\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eTyp. 95% transmission at 486nm (H-beta)\u003c\/li\u003e\n\u003cli\u003eTyp. 95% transmission at 496nm (OIII)\u003c\/li\u003e\n\u003cli\u003eTyp. 95% transmission at 501nm (OIII)\u003c\/li\u003e\n\u003cli\u003eTyp. 95% transmission at 656nm (H alpha)\u003c\/li\u003e\n\u003cli\u003eOptimum position of transmission for telescopes with focal ratios from f\/10 to f\/3,5\u003c\/li\u003e\n\u003cli\u003eEntire Blocking of annoying wavelengths\u003c\/li\u003e\n\u003cli\u003eIdeal All-round Deep Sky filter even for small telescopes\u003c\/li\u003e\n\u003cli\u003eNot sensitive to humidity or aging\u003c\/li\u003e\n\u003cli\u003eScratch-resistant!\u003c\/li\u003e\n\u003cli\u003eExcellent carrier material. The optical performance of your telescope is not reduced by the filter in any way.\u003c\/li\u003e\n\u003cli\u003eParfocal with other Astronomik filters\u003c\/li\u003e\n\u003cli\u003eGlass thickness: 1mm\u003c\/li\u003e\n\u003cli\u003eCompletely resistant against high humidity, scratches and aging effects\u003c\/li\u003e\n\u003cli\u003eDiffraction limited, the filter will not reduce the optical performance of your telescope!\u003c\/li\u003e\n\u003cli\u003eAstronomik filters are delivered in a high-quality, long lasting, filter box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/astronomik_uhc_trans_480x480.png?v=1684715375\" alt=\"\"\u003e","brand":"Astronomik","offers":[{"title":"1.25\" (-125)","offer_id":44146266931452,"sku":"ASK-UHC-125","price":149.95,"currency_code":"CAD","in_stock":true},{"title":"2\" (-2)","offer_id":44146266964220,"sku":"ASK-UHC-2","price":299.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/products\/Astronomik_UHC_1_25-Inch_4.jpg?v=1674862152"},{"product_id":"antares-high-contrast-filters","title":"Antares High Contrast Filters","description":"\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003eSpecialty blocking filter: transmits only 480-510nM. M28.4x0.6\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e2UHC\u003c\/h3\u003e\n\u003cp\u003e2UHC is a filter that blocks the visual spectrum except for wavelengths between 480nM and 510nM. Often called a Nebular or ALP (anti-light pollution) filter, this allow passage of ionized oxygen and hydrogen lines, but blocks light pollution reflectance from mercury and sodium vapor lamps. Threads into all 2\" accessories.\u003c\/p\u003e\n\u003ch3\u003eUHC(1.25)\u003c\/h3\u003e\n\u003cp\u003eUHC is a filter that blocks the visual spectrum except for wavelengths between 480nM and 510nM. Often called a Nebular or ALP (anti-light pollution) filter, this allow passage of ionized oxygen and hydrogen lines, but blocks light pollution reflectance from mercury and sodium vapor lamps. Threads into all 1.25\" accessories.\u003cbr\u003e\u003c\/p\u003e","brand":"Sky Instruments","offers":[{"title":"1.25\"","offer_id":44685553991932,"sku":"UHC","price":86.95,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":44685554024700,"sku":"2UHC","price":130.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/filter125-high-contrast.jpg?v=1697481204"},{"product_id":"baader-planetarium-6-color-eyepiece-filters-optically-polished-w-mc","title":"Baader Planetarium 6-Color Eyepiece Filters (Optically Polished w\/ MC)","description":"\u003ch4\u003e\"Less is more!\" Better a few filters with high optical performance produced for astronomical observations than whole mountains of filters with mediocre quality.\u003c\/h4\u003e\n\u003cp\u003eThe Baader color filters are carefully prepared for amateur astronomical interests. The glass are coplaner fine optically polished. These filters exceed the quality of the usual \"raw polished\" (hot flamed) colored glass filters.\u003c\/p\u003e\n\u003cp\u003eBecause they are fine optically polished, these filters can be at any point in the mean path - far ahead of the focal point (for example, in front of a binocular approach!) without causing defects (astigmatism) or to degrade the image otherwise in any way!\u003c\/p\u003e\n\u003cp\u003eThe parallelism of the optical surfaces is excellent with 30 arcseconds. Double images are absolutely excluded. For each filter color, the transmission curve is supplied as a measurement protocol.\u003c\/p\u003e\n\u003cp\u003eColor filters are often identified with a Kodak Wratten number (W-point). Baader color filters were collected by astronomical experience and correspond to the respective wavelength range following filter by Wratten nomenclature: \u003cstrong\u003eBaader-red filter ≅ W25, Baader-Orange filter ≅ W21, Baader-yellow filter≅ W12, Baader-green filter≅ W58, Baader-light blue filter ≅ W80A, Baader-dark blue filter≅ W38A\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThese filters are screwed into the filter thread of eyepieces or planetary imaging cams (Skyris). A thread at either end of the filter allows the filters to be combined with each other or with other filters (for example with a Baader UV \/ IR infrared cut filter).\u003c\/p\u003e\n\u003ch3\u003eFeatures at a Glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eLargest free opening of all colour filters on the market to eliminate any vignetting.\u003c\/li\u003e\n\u003cli\u003eCNC machined \"grip crown\" provides excellent handling and comfort.\u003c\/li\u003e\n\u003cli\u003eBoth sides 7-layer AR coating with only 0.25% residual reflection per surface. This is the most anti-reflective that has ever been undertaken with colour filters.\u003c\/li\u003e\n\u003cli\u003eThe most important criterion for any kind of light filtering is brightness. Certain spectral ranges at high magnification will only work at the highest light transmittance.\u003c\/li\u003e\n\u003cli\u003eThe long-pass filter in this filter set offers 98% transmission and produces no flare. Unmatched by other brands. This can be seen in comparison with standard colour filters at once - the filter colour radiant downright.\u003c\/li\u003e\n\u003cli\u003eThe combination of our infrared (IR) cut filter and the RG 610 red filter results as an extremely narrow-band H-α pass filter for the CCD photography of red emission nebulae - at a ridiculously low price!\u003c\/li\u003e\n\u003cli\u003eA wide range of adaptors allow the uses of T-2 photo threads (See: Baader Astro T-2 System).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBaader Phantom Group Coating\u003c\/h3\u003e\n\u003cp\u003eDeveloped by Baader Planetarium the coating is a 7-layer broadband coating with extremely low residual reflection. The term \"Group\" indicates that the respective most effective anti-reflection layer system was calculated for each type of glass of the filter.\u003c\/p\u003e\n\u003cp\u003eThis means that the anti-reflection layers of different colour filters are different. They are calculated to provide the maximum for the respective filtered colour transmission values.\u003c\/p\u003e\n\u003cp\u003eBoth sides of the filter are coated with 7-layer AR coating with only 0.25% residual reflection per surface. This is the most that has ever been provided for colour filters. The filter discs are screwed into the blackened aluminium frames and are delivered within a filter. Each filter is designed for multiple applications.\u003c\/p\u003e\n\u003ch3\u003eFilter Options\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e \u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eRed\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eOrange\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eYellow\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eGreen\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eLight Blue\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eDark Blue\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eFilter Set (w\/ All 6 Colors)\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e1.25 inch\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSKU: 2458307\u003cbr\u003eEAN: 4047825009739\u003c\/td\u003e\n\u003ctd\u003eSKU: 2458306\u003cbr\u003eEAN: 4047825009746\u003c\/td\u003e\n\u003ctd\u003eSKU: 2458301\u003cbr\u003eEAN: 4047825009814\u003c\/td\u003e\n\u003ctd\u003eSKU: 2458304\u003cbr\u003eEAN: 4047825009777\u003c\/td\u003e\n\u003ctd\u003eSKU: 2458303\u003cbr\u003eEAN: 4047825009791\u003c\/td\u003e\n\u003ctd\u003eSKU: 2458302\u003cbr\u003eEAN: 4047825025111\u003c\/td\u003e\n\u003ctd\u003eSKU: 2458300\u003cbr\u003eEAN: 4047825009821\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e2 inch\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSKU: 2458317\u003cbr\u003eEAN: 4047825009661\u003c\/td\u003e\n\u003ctd\u003eSKU: 2458316\u003cbr\u003eEAN: 4047825009678\u003c\/td\u003e\n\u003ctd\u003eSKU: 2458311\u003cbr\u003eEAN: 4047825009715\u003c\/td\u003e\n\u003ctd\u003eSKU: 2458314\u003cbr\u003eEAN: 4047825009685\u003c\/td\u003e\n\u003ctd\u003eSKU: 2458313\u003cbr\u003eEAN: 4047825009692\u003c\/td\u003e\n\u003ctd\u003eSKU: 2458312\u003cbr\u003eEAN: 4047825009708\u003c\/td\u003e\n\u003ctd\u003eSKU: 2458310\u003cbr\u003eEAN: 4047825009722\u003cbr\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eNote: these specifications are for the \u003cu\u003e6-Color Filter Sets\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSIZE OPTION\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e1.25 inch\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e2 inch\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMANUFACTURER\u003c\/td\u003e\n\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\n\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU (#)\u003c\/td\u003e\n\u003ctd\u003e2458300\u003c\/td\u003e\n\u003ctd\u003e2458310\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEAN CODE\u003c\/td\u003e\n\u003ctd\u003e4047825009821\u003c\/td\u003e\n\u003ctd\u003e4047825009722\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNET WEIGHT (KG)\u003c\/td\u003e\n\u003ctd\u003e0.35\u003c\/td\u003e\n\u003ctd\u003e0.40\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTRANSMISSION RANGE\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003eMltiple bands (see spectral image below)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFILTER THICKNESS (WITHOUT CELL)\u003c\/td\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAR-COATING\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003ePhantom Coating® Group, planeoptically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFILTER SIZE\u003c\/td\u003e\n\u003ctd\u003e1.25 inch\u003c\/td\u003e\n\u003ctd\u003e2 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFILTER USAGE\u003c\/td\u003e\n\u003ctd\u003eColor, Planetary\u003c\/td\u003e\n\u003ctd\u003eColor, Planetary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFILTER MOUNTED\u003c\/td\u003e\n\u003ctd\u003eMounted (LPFC 6mm)\u003c\/td\u003e\n\u003ctd\u003eMounted (LPFC 6mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTYPE OF FILTER\u003c\/td\u003e\n\u003ctd\u003eBandpass, Longpass\u003c\/td\u003e\n\u003ctd\u003eBandpass, Longpass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSINGLE OR SET\u003c\/td\u003e\n\u003ctd\u003eFilter Set\u003c\/td\u003e\n\u003ctd\u003eFilter Set\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFILTER SHAPE\u003c\/td\u003e\n\u003ctd\u003eRound\u003c\/td\u003e\n\u003ctd\u003eRound\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cimg alt=\"Baader Planetarium 6-Color Eyepiece Filter Transmission Curves\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/baader-color-filter-set-moon-and-planetary-6-colors.jpg?v=1709622223\"\u003e\u003c\/p\u003e","brand":"Baader Planetarium","offers":[{"title":"1.25 inch \/ Filter Set (w\/ All 6 Colors)","offer_id":45162751590652,"sku":"2458300","price":401.0,"currency_code":"CAD","in_stock":true},{"title":"1.25 inch \/ Yellow","offer_id":45162736910588,"sku":"2458301","price":75.0,"currency_code":"CAD","in_stock":true},{"title":"1.25 inch \/ Dark Blue","offer_id":45162737008892,"sku":"2458302","price":75.0,"currency_code":"CAD","in_stock":true},{"title":"1.25 inch \/ Light Blue","offer_id":45162736976124,"sku":"2458303","price":75.0,"currency_code":"CAD","in_stock":true},{"title":"1.25 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Green","offer_id":45162737139964,"sku":"2458314","price":110.0,"currency_code":"CAD","in_stock":true},{"title":"2 inch \/ Orange","offer_id":45162737074428,"sku":"2458316","price":110.0,"currency_code":"CAD","in_stock":true},{"title":"2 inch \/ Red","offer_id":45162737041660,"sku":"2458317","price":110.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/baader-colour-filters-blue-bright-blue-green-yellow-red-orange-641.jpg?v=1709621565"},{"product_id":"baader-planetarium-7-5-nm-solar-continuum-filter-1-25-2-2961580-2961581","title":"Baader Planetarium 7.5 nm Solar Continuum Filter 1.25\" \u0026 2\" (2961580\/2961581)","description":"\u003ch3\u003eBaader 7.5nm Solar Continuum Filter – for Visual and Photographic Observations of the Sun\u003c\/h3\u003e\n\u003cp\u003eThe Solar Continuum Filter is practically a narrow band photosphere filter for solar observation in white light. It provides the highest contrast in the photosphere of the sun. The filter works as a monochromator: suppressing the effects of the atmospheric turbulence and delivering images that are significantly sharper.\u003c\/p\u003e\n\u003cp\u003eLens systems - including those of apochromats, catadiopters or eyepieces - are traditionally optimized for the spectral range around 540nm, since this is where our eye has the highest sensitivity. This narrowband filter therefore blocks everything with the exception of the spectral range in which a lens optic works most sharply and with the highest contrast. The effect is greatest on achromatic lens telescopes; but there is also an effect on apochromatic telescopes, catadioptric systems, and even pure mirror systems by reducing air turbulence.\u003c\/p\u003e\n\u003cp\u003eAs a monochromatic filter, it is ideal for use on monochromatic cameras and can even provide a tremendous gain on pure color systems.\u003c\/p\u003e\n\u003cp\u003eWith a colour camera, as with deep-sky narrow-band photography, it is less effective as only the green pixels are used. Thus, although you still benefit from the improved image sharpness of the telescope that is optimized for green wavelengths (and the reduction of the influences of air turbulence), with a colour camera you cannot fully exploit the better image quality compared to monochrome cameras, as you are effectively working with reduced camera resolution.\u003c\/p\u003e\n\u003cp\u003eCompared to the previous model with a 10nm half-band-width, this filter has a half-band-width of only 7.5nm, which increases the contrast even more. It thus replaces both the previous Baader 10nm Solar Continuum filter and the stacked 1.25\" filter #2458392. The single filter is so good that stacking is no longer necessary - the contrast gain of a single 7.5nm filter makes stacking unnecessary, and this performance is now also available in 2\".\u003c\/p\u003e\n\u003cp\u003eThe Baader 7.5nm Solar Continuum filter is also be included in the scope of delivery of the Der Baader 7.5 nm Solar Continuum Filter gehört auch zum Lieferumfang des Baader 2\" Cool-Ceramic Safety Herschelprisma Mark II (Visuell \/ Fotografisch).\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncreased Contrast\u003c\/strong\u003e matched for typical CMOS quantum efficiency and s\/n ratio\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReflex-Blocker Coatings\u003c\/strong\u003e for largest ever freedom from halos, even under most adverse conditions concerning aux-optics\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdentical Filter Thickness\u003c\/strong\u003e to existing standards, with utmost care for parfocality\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBlackened Edges All Rround\u003c\/strong\u003e with filter-lead-side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEach Filter Coated Individually\u003c\/strong\u003e with sealed coating edge (NOT cut out of a larger plate with coatings left exposed, read more)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLife-Coat:\u003c\/strong\u003e evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWarning:\u003c\/strong\u003e This is NOT a solar filter.  The Solar Continuum Filter must be used for purely VISUAL solar observation ONLY with additional filtering (e.g. Baader Herschel prism or AstroSolar Safety Film).\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet Weight (Kg)\u003c\/td\u003e\n\u003ctd\u003e0.01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Range\u003c\/td\u003e\n\u003ctd\u003e535-545 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCentral Wavelength (CWL)\u003c\/td\u003e\n\u003ctd\u003e540 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Thickness (without Cell)\u003c\/td\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAR-Coating\u003c\/td\u003e\n\u003ctd\u003eReflex-Blocker™ hard coated, planeoptically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Size\u003c\/td\u003e\n\u003ctd\u003e1.25 and 2 inch available\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Usage\u003c\/td\u003e\n\u003ctd\u003eCMOS, Contrast Enhancement, Solar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Mounted\u003c\/td\u003e\n\u003ctd\u003eMounted (LPFC 6mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTyor of Filter\u003c\/td\u003e\n\u003ctd\u003eNarrowband\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSingle or Set\u003c\/td\u003e\n\u003ctd\u003eSingle Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Shape\u003c\/td\u003e\n\u003ctd\u003eRound\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Baader Planetarium","offers":[{"title":"1.25\"","offer_id":46137979633916,"sku":"2961580","price":172.0,"currency_code":"CAD","in_stock":true},{"title":"2\"","offer_id":46137979666684,"sku":"2961581","price":289.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/baader-75nm-solar-continuum-filter-540nm-375.jpg?v=1720200300"},{"product_id":"optolong-uhc-light-pollution-filter-eos-c-clip-filter-opt-uhc-eos-c-ff","title":"Optolong UHC Light Pollution Filter EOS-C Clip Filter (OPT-UHC-EOS-C)","description":"\u003cp\u003eThe UHC (Ultra High Contrast) broadband filter is designed to improve the visibility of various deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high \u0026amp; low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm), H-alpha(656nm) as well as SII(672nm), the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eSuitable for colour CCD cameras and unmodified DSLRs.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eUHC with narrower passband provides higher contrast than CLS. Thus it is more suitable for urban environment where you suffer from severe light pollution.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eUHC has a substantial red passband and offer superb views for objects like the Orion Nebula (M42).\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eLight pollution filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eWARNING: The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. You would be BLIND if you fail to observe the warning.\u003c\/p\u003e\n\u003ch4\u003eOptolong CLS Spectrum and Characteristic\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSubstrate: optical glass\u003c\/li\u003e\n\u003cli\u003eTave\u0026gt;95%\u003c\/li\u003e\n\u003cli\u003eBlocking range: 300-700nm\u003c\/li\u003e\n\u003cli\u003eBlocking depth: OD3, light pollution line blocking \u0026gt;99%\u003c\/li\u003e\n\u003cli\u003eSurface quality: 60\/40 (Refer to MIL-O-13830A, MIL-C-48497A)\u003c\/li\u003e\n\u003cli\u003eTransmitted Wavefront RMS: ¼ λ\u003c\/li\u003e\n\u003cli\u003eParallelism: 30s\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCoating Technology\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eMulti-layers anti-reflection coating\u003c\/li\u003e\n\u003cli\u003eNon-cementing optical substrate coating\u003c\/li\u003e\n\u003cli\u003eOptolong L-Pro filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/li\u003e\n\u003cli\u003ePlanetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePacking\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOuter Box: silve box\u003c\/li\u003e\n\u003cli\u003ePlastic Box: PP material\u003c\/li\u003e\n\u003cli\u003eLining: imported high pressure white EVA material\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cp\u003eOptolong EOS-C clip filter available for below camera body:\u003c\/p\u003e\n\u003cp\u003eCanon Digital Rebel XS, Canon Digital Rebel XSi, Canon EOS 1000D, Canon EOS 500D, Canon EOS Kiss F, Canon EOS Kiss X2, Canon EOS Kiss X3, Canon EOS Rebel T1i, Canon EOS 60D + 60Da, Canon EOS 7D, Canon EOS 70D,\u003c\/p\u003e\n\u003cp\u003eCanon EOS 50D, Canon EOS 650D, Canon EOS 600D, Canon EOS 550D, Canon EOS 700D, Canon EOS 1100D, Canon EOS 1200D, Canon EOS 40D, Canon EOS 30D, Canon EOS 20D, Canon EOS 10D, Canon EOS D60, Canon EOS D30\u003c\/p\u003e\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":47008822001916,"sku":"10103","price":132.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/353016fb7bd95755949f93a6ac9f6ec2_1.jpg?v=1742852893"},{"product_id":"optolong-uhc-light-pollution-filter-eos-ff-clip-filter-opt-uhc-eos-ff","title":"Optolong UHC Light Pollution Filter EOS-FF Clip Filter (OPT-UHC-EOS-FF)","description":"\u003cp\u003eThe UHC (Ultra High Contrast) broadband filter is designed to improve the visibility of various deepsky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapor lamps, both high \u0026amp; low pressure sodium vapor lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm), H-alpha(656nm) as well as SII(672nm), the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eSuitable for colour CCD cameras and unmodified DSLRs.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eUHC with narrower passband provides higher contrast than CLS. Thus it is more suitable for urban environment where you suffer from severe light pollution.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eUHC has a substantial red passband and offer superb views for objects like the Orion Nebula (M42).\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eLight pollution filter do not eliminate the effects of light pollution or increase the object’s brightness. In many cases, they increase the contrast between nebula and night sky, not brightening the nebula.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eWARNING: The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. You would be BLIND if you fail to observe the warning.\u003c\/p\u003e\n\u003ch4\u003eOptolong CLS Spectrum and Characteristic\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSubstrate: optical glass\u003c\/li\u003e\n\u003cli\u003eTave\u0026gt;95%\u003c\/li\u003e\n\u003cli\u003eBlocking range: 300-700nm\u003c\/li\u003e\n\u003cli\u003eBlocking depth: OD3, light pollution line blocking \u0026gt;99%\u003c\/li\u003e\n\u003cli\u003eSurface quality: 60\/40 (Refer to MIL-O-13830A, MIL-C-48497A)\u003c\/li\u003e\n\u003cli\u003eTransmitted Wavefront RMS: ¼ λ\u003c\/li\u003e\n\u003cli\u003eParallelism: 30s\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCoating Technology\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eMulti-layers anti-reflection coating\u003c\/li\u003e\n\u003cli\u003eNon-cementing optical substrate coating\u003c\/li\u003e\n\u003cli\u003eOptolong L-Pro filter adopts precision coating based on Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change.\u003c\/li\u003e\n\u003cli\u003ePlanetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePacking\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOuter Box: silve box\u003c\/li\u003e\n\u003cli\u003ePlastic Box: PP material\u003c\/li\u003e\n\u003cli\u003eLining: imported high pressure white EVA material\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/eccb72ab0191cd7731a2faef43830365_1.jpg?v=1742853475\"\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e","brand":"Optolong","offers":[{"title":"Default Title","offer_id":47008843858172,"sku":"10104","price":160.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/f11d33108d051c68fc8cba09d6128081.jpg?v=1742853475"},{"product_id":"antlia-8-el-uhc-pro-visual-enhancer-2-filter-8el-uhc-pro-2","title":"Antlia 8-EL UHC Pro Visual Enhancer 2\" Filter (8EL-UHC-PRO-2)","description":"\u003cp\u003eThe Antlia 8-EL UHC Pro Visual Enhancer filter is a high-performance optical filter designed for visual observation of celestial objects.\u003c\/p\u003e\n\u003cp\u003eThis filter is designed to combat moderate light pollution while maintaining excellent color balance, making it ideal for visual observation of emission nebulae, planetary nebulae, and other objects. It selectively enhances key emission lines through its high-transmission design. The combination of high transmission (\u0026gt;95%) and sodium-light suppression allows observers to perceive fine structural details in Planetary nebula, emission nebula targets, even under moderate light pollution.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFWHM\u003c\/td\u003e\n\u003ctd\u003eVaries\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCWL (Central Wavelength)\u003c\/td\u003e\n\u003ctd\u003e671.6nm (SII) \/ 673.1nm (SII) \/ 486.1nm (H-beta) \/ 495.9nm (OIII) \/ 500.7nm (OIII) \/ 654.8nm (NII) \/ 658.3nm (NII) \/ 656.3nm (H-alpha) \/ 671.6nm (SII) \/ 673.1nm (SII)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak Transmission\u003c\/td\u003e\n\u003ctd\u003e95% for all CWLs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlocking\u003c\/td\u003e\n\u003ctd\u003e≥OD5 @ 300-1100nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Thickness\u003c\/td\u003e\n\u003ctd\u003e2mm+\/-0.05mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eTransmission Chart \u0026amp; Notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/8EL-UHC-PRO-2.png?v=1748296572\"\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEmission Lines\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSuggested Observation Targets\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e486.1nm (H-beta)\u003c\/td\u003e\n\u003ctd\u003eM42 Orion Nebula,NGC 7000 North America Nebula,M16 Eagle Nebula, M8 Lagoon Nebula\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e495.9nm (OIII)\u003c\/td\u003e\n\u003ctd\u003e-Recommended Nebulae: M57 Ring Nebula,NGC6960 Veil Nebula,NGC6543 Cat's Eye Nebula,NGC6302 Butterfly Nebula\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e500.7nm (OIII)\u003c\/td\u003e\n\u003ctd\u003eM42 Orion Nebula, M57 Ring Nebula, NGC 6992 Veil Nebula on the east side, IC 2177 Seagull Nebula, M104 Broad-shouldered Cap Galaxy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e654.8nm (NII)\u003c\/td\u003e\n\u003ctd\u003eNGC 6960 Veil Nebula, M1 Crab Nebula, M57 Ring Nebula, NGC 6543 Cat's Eye Nebula\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e658.3nm (NII)\u003c\/td\u003e\n\u003ctd\u003eM42 Orion Nebula, NGC 6960 Veil Nebula, M57 Ring Nebula\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e656.3nm (H-alpha)\u003c\/td\u003e\n\u003ctd\u003eM42 Orion Nebula, IC434 Horsehead Nebula, NGC7000 North America Nebula, M16 Eagle Nebula, M8 Lagoon Nebula, NGC6960 Veil Nebula\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e671.6nm (SII)\u003c\/td\u003e\n\u003ctd\u003eM42 Orion Nebula, IC434 Horsehead Nebula, M1 Crab Nebula, M16 Eagle Nebula, M57 Ring Nebula, NGC6543 Cat's Eye Nebula\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e673.1nm (SII)\u003c\/td\u003e\n\u003ctd\u003eM42 Orion Nebula, M1 Cassiopeia Nebula, NGC 6960 Veil Nebula, IC 443 Jellyfish Nebula, M27 Sundial Nebula\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Antlia","offers":[{"title":"Default Title","offer_id":47206536839420,"sku":"8EL-UHC-PRO-2","price":165.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/8EL-UHC-PRO-2.jpg?v=1748296572"},{"product_id":"baader-single-polarizing-filter-2","title":"Baader Single Polarizing Filter 2\"","description":"\u003cul\u003e\n\u003cli\u003eBaader 2\" Polarizing Filter - ( 1 piece)\u003c\/li\u003e\n\u003cli\u003eFor stepless brightness-controll in combination with another single polarizing filter or a Herschel Wedge\u003c\/li\u003e\n\u003cli\u003ePerfect for observing moon or planets, or for solar observations with AstroSolar Safety Film ND 5.0. You can change the brightnes if you rotate two single polarizing filters against each other, to adjust the brightness according to your magnification. You can e.g. mount one 1,25\" filter in the eyepiece and a 2\" filter in the reducer piece from 2\" to 1.25\"\u003c\/li\u003e\n\u003cli\u003eFor solar observation in behind a Baader Herschel Wedge. The Herschel wedge already polarizes the light, so that one single polarizing filter is sufficient.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlease note:\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ePolarizing filters (and all other eyepiece filters) may never be used without an approriate solar filter (Astrosolar front filter, Herschel Wedge).\u003c\/li\u003e\n\u003cli\u003eEnhances contrast during planetary observation.\u003c\/li\u003e\n\u003cli\u003eYou need two polarizing filters to adjust the brightness. Alternatively, you can also use the the double polarizing filter #2408340 (1,25\") or #2408344 (2\"), where two filters can be rotated in the filter cell. Polarizing filters offer the highest flexibility; if you are looking for superior image quality, you should use regular Neutral Density Filter, where there are less glass surfaces in the light path.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eTo screw into 1¼ or 2\" eyepieces\/threads. Useful in Lunar and Solar observations to limit brightness and increasing contrast.\u003c\/p\u003e\n\u003cp\u003eThe filter can also be used with a Baader Hershel Wedge to provide an adjustable brightness. Positioned between the Baader Hershel Wedge and Eyepiece the filter\/eyepiece combination can then be rotated to adjust brightness.\u003c\/p\u003e\n\u003ch3\u003eImportant Information for Observing the Sun\u003c\/h3\u003e\n\u003cp\u003ePolarizer and neutral density filters need additional filtering (for example, Herschel Prism or Astro Solar Safety Film) before the eyepiece of the telescope for observations of the sun. Using without the appropriate filters can cause damage to the these filters and eyesight.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003e2408342\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEAN Code\u003c\/td\u003e\n\u003ctd\u003e4047825012456\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer\u003c\/td\u003e\n\u003ctd\u003eBaader Planetarium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNet weight (kg)\u003c\/td\u003e\n\u003ctd\u003e0.01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Specifications\u003c\/td\u003e\n\u003ctd\u003eAR-Coating Phantom Coating® Group plane optically polished\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Range\u003c\/td\u003e\n\u003ctd\u003efull Spectrum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType of Filter\u003c\/td\u003e\n\u003ctd\u003eNeutral Density Polarizing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMechanical Specifications\u003c\/td\u003e\n\u003ctd\u003eFilter mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDouble mounted (LPFC 6mm)\u003c\/td\u003e\n\u003ctd\u003etotal height 15mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter shape\u003c\/td\u003e\n\u003ctd\u003eround\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter size\u003c\/td\u003e\n\u003ctd\u003e2 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Thickness (without cell)\u003c\/td\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUsage \u0026amp; Features\u003c\/td\u003e\n\u003ctd\u003eFilter Usage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLunar\/Planetary\u003c\/td\u003e\n\u003ctd\u003eSolar\/Specialty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSingle or Set\u003c\/td\u003e\n\u003ctd\u003eSingle Filter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Baader Planetarium","offers":[{"title":"1.25\" | 2408343","offer_id":48370905776380,"sku":"2408343","price":62.0,"currency_code":"CAD","in_stock":true},{"title":"2\" | 2408342","offer_id":48370905809148,"sku":"2408342","price":105.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/imgi_77_2408342-38-O-N-1.jpg?v=1761598227"},{"product_id":"astronomik-1-25-2-dark-filter","title":"Astronomik 1.25\"\/2\" Dark filter","description":"\u003cp\u003eWith this \"filter\" you can close an opening in filter wheels light-tight. This allows you to create dark images with cameras without their own shutter and to realize a \"park\" position of a filter wheel.\u003c\/p\u003e\n\u003cp\u003eThe Astronomik Dark-Filters fit perfectly in all filter wheels of the brands ZWO, QHY, QSI, Starlight Xpress, SBIG, Moravian and Atik.\u003c\/p\u003e","brand":"Astronomik","offers":[{"title":"1.25\" (-125)","offer_id":48371384877308,"sku":"ASK-DF-125","price":34.0,"currency_code":"CAD","in_stock":true},{"title":"2\" (-2)","offer_id":48371384910076,"sku":"ASK-DF-2","price":42.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/Astronomik_Dark_1_25-Inch_1920x1920_b0b5a618-21b2-412b-92d4-065caeda4118.jpg?v=1761604394"},{"product_id":"celestron-light-pollution-imaging-filter-rasa-93617","title":"Celestron Light Pollution Imaging Filter - RASA 11 (93617)","description":"\u003cp\u003eGet the most out of your Celestron Rowe-Ackermann Schmidt Astrograph 11, even under light-polluted skies, with this Light Pollution Imaging Filter, custom-designed for the RASA. No matter which camera you use, this filter’s generous 68 mm clear aperture allows it to easily accommodate today’s largest sensors. Utilizing a machined aluminum housing and Schott B270 glass, the filter replaces the RASA’s clear optical window so the RASA’s optical performance is unaltered.\u003c\/p\u003e\n\u003ch3\u003eRemove Light Pollution While Keeping Your Images Bright\u003c\/h3\u003e\n\u003cp\u003eLight pollution limits how much of the night sky we can see and photograph. When imaging with a color camera in light polluted areas, skyglow degrades image quality. Light pollution filters help to selectively block light emitted from common streetlights and other ambient lighting. But most light pollution filters greatly compromise the total light throughput, causing dim images, and negatively impact the color balance, causing images to appear too green or blue.\u003c\/p\u003e\n\u003cp\u003eThe Light Pollution Imaging Filter for RASA “surgically” removes unwanted light pollution while preserving as much of the useful spectrum as possible. That means you’ll still retain over 90 percent of the light captured by your telescope at many wavelengths.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/93617_LPIF_comparison.webp?v=1761712404\"\u003e\u003c\/p\u003e\n\u003cp\u003eUnlike other light pollution suppression filters, the Celestron LP Imaging Filter for RASA maintains a relatively neutral color balance so you can bring out subtle color in galaxies and other faint deep sky objects. Multiple layers of specially-formulated dielectric coatings provide the desired transmission, while anti-reflective coatings minimize star halos and internal reflections.\u003c\/p\u003e\n\u003cp\u003eAlso included is a clear plastic case to protect the filter when not in use\u003c\/p\u003e\n\u003ch4\u003eIndividually Tested for Quality\u003c\/h4\u003e\n\u003cp\u003eEvery Celestron Light Pollution Imaging Filter is tested individually for light transmission. Inside the box, you’ll receive a graph detailing the actual transmission spectrum for your specific filter.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass Thickness:\u003c\/td\u003e\n\u003ctd\u003e2.1mm (0.08\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Diameter:\u003c\/td\u003e\n\u003ctd\u003e72mm (2.83\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClear Aperture:\u003c\/td\u003e\n\u003ctd\u003e68mm (2.67\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings:\u003c\/td\u003e\n\u003ctd\u003eHard Coated dielectric and multi-layer antireflection coatings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFilter Glass:\u003c\/td\u003e\n\u003ctd\u003eSchott B270\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHousing:\u003c\/td\u003e\n\u003ctd\u003eAndodized aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTransmission Curve\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/SpectrumTransmission_REV.webp?v=1761712516\" alt=\"\"\u003e\u003c\/p\u003e","brand":"Celestron","offers":[{"title":"Default Title","offer_id":48378490519804,"sku":"93617","price":977.95,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/93617_LPIF_Front.webp?v=1761712309"}],"url":"https:\/\/usa.all-startelescope.com\/collections\/visual-astronomy-filters.oembed?page=2","provider":"All-Star Telescope Canada","version":"1.0","type":"link"}