Baader Colour Filter-Set 2" Moon and Planetary (6 colours)

Product code: 2458310
in stock
[value]
£319.00
£265.83 (ex. VAT)

PREORDER : 2 weeks

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Product information

  • Fits 2" threads
  • Colour Filter Set with 6 colours for contrast enhancement of lunar and planetary observations.
  • Largest free opening of all the colour 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.
  • Included Filters: Dark Blue Filter, Light Blue Filter, Green Filter, Yellow Filter, Orange Filter and Red Filter
  • Non-ageing sealed coating

Colour filters for increased contrast of lunar and planetary observations

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

The complete Baader 2" Filter Set

The complete Baader Der 2" Filter Set

The complete Baader 1 1/4" Filter Set

The complete Baader 1¼" Filter Set

The Baader colour 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) coloured 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 colour, the transmission curve is supplied as a measurement protocol.

Colour filters are often identified with a Kodak Wratten number (W-point). Baader colour 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).

Transmission curves of 6 Baader colour filters (dark blue, light blue, green, yellow, orange and red)

Transmission curves of 6 Baader colour filters (dark blue, light blue, green, yellow, orange and red)
Click here to enlarge

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 1¼" and the RG 610 red filter results as an extremely narrow-band H- 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.

MANUFACTURERBaader Planetarium
SKU (#)2458310
EAN CODE4047825009722
WEIGHT (NETTO)0.396
TRANSMISSION RANGEmultiple bands (see spectral image)
FILTER THICKNESS (WITHOUT CELL)2 mm
AR-COATINGPhantom Coating® Group, planeoptically polished
FILTER SIZE2 inch
FILTER USAGEColor, Planetary
FILTER MOUNTEDMounted (LPFC 6mm)
TYPE OF FILTERBandpass, Longpass
SINGLE OR SET?Filter-Set
FILTER SHAPEround

Product Info

PREORDER 2 weeks
GTIN 4047825009722
Brand Baader
Product Code 2458310
Delivery Weight Package
1kg