{"product_id":"lunt-ls60fha-h-alpha-filter","title":"Lunt Solar Systems LS60FHa Front Mount 60 mm Double Stack Filter","description":"\u003cp\u003e\u003cstrong\u003eNow equipped with Lunt’s newer, higher-performing etalons, these telescopes deliver a tighter ≤0.35Å FWHM per etalon, improved from the previous ~0.55Å design. In double-stack configuration, system bandwidth drops to approximately 0.22Å for even greater contrast and finer solar surface detail.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eLS60FHa H-Alpha Filter\u003c\/h3\u003e\n\u003cp\u003eThe Lunt LS60FHa is a 60 mm aperture (no central obstruction) integrally tuned etalon for use on a customer supplied refractor.\u003c\/p\u003e\n\u003cp\u003eA B600 blocking filter provides full disk images on telescopes up to 540 mm focal length. Larger blocking filters suitable for longer focal length telescopes are also available options. Choose the filter\/blocking filter package that is suitable for your telescope and your focuser size:\u003c\/p\u003e\n\u003cp\u003eThis Hydrogen-alpha filter is designed to retrofit (adapters required) a customer-supplied telescope for use during the day. It is easily removable so that the scope can continue to be used for night observing.\u003c\/p\u003e\n\u003cp\u003eBecause the LS60FHa H-Alpha Filter has an estimated bandpass of \u0026lt;0.70 Angstrom, it is capable of providing high contrast views of both surface and edge detail. Adding an additional etalon system (double-stacking) will reduce the bandpass to ~\u0026lt;0.50 (dependent upon scope) allowing for higher resolution viewing and\/or imaging. An LS60FHa H-Alpha Filter without blocking filter is offered for this purpose or for those who already have a Lunt blocking filter. A Lunt blocking filter must be used with Lunt Ha filters at all times.\u003c\/p\u003e\n\u003ch5\u003eLS60FHa Specifications: (single filter)\u003c\/h5\u003e\n\u003cul\u003e\n\u003cli\u003eOptical Aperture: 60 mm\u003c\/li\u003e\n\u003cli\u003eEtalon: Internal \u0026lt;0.70 Angstrom\u003c\/li\u003e\n\u003cli\u003eTuning: Tilt\u003c\/li\u003e\n\u003cli\u003eFocal Length: Customer Telescope\u003c\/li\u003e\n\u003cli\u003eStorage: Aluminum finished hard case with fitted foam\u003c\/li\u003e\n\u003cli\u003eWeight: 3 lb (~1.5 kg)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"has-text-align-left\"\u003eEnjoy the latest news and photos of the Sun from \u003ca href=\"https:\/\/www.nasa.gov\/sun\"\u003eNASA\u003c\/a\u003e.\u003c\/p\u003e","brand":"Lunt Solar Systems","offers":[{"title":"Default Title","offer_id":48956581609724,"sku":"LS60FHaP","price":1494.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/7702\/9116\/files\/Double-Stack-Filter-60F-Lunt-Solar-Telescope_9fda3e4f-5cf2-4b59-9858-90d81469f29d.jpg?v=1775935035","url":"https:\/\/usa.all-startelescope.com\/products\/lunt-ls60fha-h-alpha-filter","provider":"All-Star Telescope Canada","version":"1.0","type":"link"}