Brand: Baader Planetarium

Baader Planetarium 6-Color Eyepiece Filters (Optically Polished w/ MC)

Brand: Baader Planetarium

Baader Planetarium 6-Color Eyepiece Filters (Optically Polished w/ MC)

  • Colour Filter Set with 6 available colors for contrast enhancement of lunar and planetary observations.
  • Largest free opening of all the color filters on the market which eliminates any vignetting.
  • Double 7-layer anti-reflection coating with only 0.25% residual reflection per surface (Phantom Group Coating) resulting in no reflections, scatter or dimming.
  • Planeoptically polished for sharp image at high magnification.
  • Non-ageing sealed coating
Special Order
$53.00 USD

Filter Size

1.25 inch 2 inch

Color Option

Red Orange Yellow Green Light Blue Dark Blue Filter Set (w/ All 6 Colors)

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Special Order
$53.00 USD

Easy Payment Options with .

How do I Special Order?
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Product Description

"Less is more!" Better a few filters with high optical performance produced for astronomical observations than whole mountains of filters with mediocre quality.

The 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.

Because 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!

The 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.

Color 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: Baader-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

These 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).

Features at a Glance

  • Largest free opening of all colour filters on the market to eliminate any vignetting.
  • CNC machined "grip crown" provides excellent handling and comfort.
  • Both 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.
  • The 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.
  • The 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.
  • The 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!
  • A wide range of adaptors allow the uses of T-2 photo threads (See: Baader Astro T-2 System).

Baader Phantom Group Coating

Developed 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.

This 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.

Both 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.

Filter Options

  Red Orange Yellow Green Light Blue Dark Blue Filter Set (w/ All 6 Colors)
1.25 inch SKU: 2458307
EAN: 4047825009739
SKU: 2458306
EAN: 4047825009746
SKU: 2458301
EAN: 4047825009814
SKU: 2458304
EAN: 4047825009777
SKU: 2458303
EAN: 4047825009791
SKU: 2458302
EAN: 4047825025111
SKU: 2458300
EAN: 4047825009821
2 inch SKU: 2458317
EAN: 4047825009661
SKU: 2458316
EAN: 4047825009678
SKU: 2458311
EAN: 4047825009715
SKU: 2458314
EAN: 4047825009685
SKU: 2458313
EAN: 4047825009692
SKU: 2458312
EAN: 4047825009708
SKU: 2458310
EAN: 4047825009722

Specifications

Note: these specifications are for the 6-Color Filter Sets

SIZE OPTION 1.25 inch 2 inch
MANUFACTURER Baader Planetarium Baader Planetarium
SKU (#) 2458300 2458310
EAN CODE 4047825009821 4047825009722
NET WEIGHT (KG) 0.35 0.40
TRANSMISSION RANGE Mltiple bands (see spectral image below)
FILTER THICKNESS (WITHOUT CELL) 2 mm 2 mm
AR-COATING Phantom Coating® Group, planeoptically polished
FILTER SIZE 1.25 inch 2 inch
FILTER USAGE Color, Planetary Color, Planetary
FILTER MOUNTED Mounted (LPFC 6mm) Mounted (LPFC 6mm)
TYPE OF FILTER Bandpass, Longpass Bandpass, Longpass
SINGLE OR SET Filter Set Filter Set
FILTER SHAPE Round Round

Baader Planetarium 6-Color Eyepiece Filter Transmission Curves

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