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Home Filters Astro Imaging Filters Altair QuadBand OSC CCD 2 Inch Filter
Altair Quad-Band 2 inch Filter for OSC CMOS, CCD and Modified or Unmodded DSLR cameras desgned for medium light polluted areas. Narrowband Bi-Colour imaging is a growing new trend in astrophotography, especially popular in light polluted areas, or for imaging in rural areas in moonlight.Now you can capture the two main emission nebulae bands at the same time, whilst suppressing light pollution, moonlight, and airglow. Capture more data in less time, and open up your imaging time window - even into the summer months.Altair Tri-Band and Quad Band filters work by isolating the primary nebulae emission zones in the red and blue/green wavelengths, and separating them into two main "zones" with a wide separation for easy capture with a colour camera - all in one exposure! Not only is capture very convenient, but processing is easy too, thanks to the wide separation of the green/blue and red "zones". Light pollution control is extremely effective and LED light is also significantly reduced, thanks to the effects of Rayleigh scattering.There are 3 types of OSC line filters in the Altair range:Dual-Band Allowing only the thinnest peaks of Ha 656.3nm and 500.7nm Oiii light from emission nebulae through. (Recommended for extreme light pollution in the worst possible conditions).Tri-Band Combines Ha into a red zone, and H-beta + Oiii into a green/blue zone. (For urban light pollution).Quad Band Combines Sii AND Ha into a red zone, and H-beta + Oiii into a green/blue zone. (For suburban / moderate light pollution).Sensitive OSC or "One Shot Colour" CMOS cameras like the #Hypercam183C capture these wavelengths very efficiently, and allow them through the Bayer matrix. The filters also work with DSLRs (APS-C sensor size modified cameras are best, but normal ones will also work). When you have the complete stack of exposures, processing is relatively easy because of the large separation in colour. You can also use the Quad band and Tri-Band filters as a "super luminance filter" for imaging nebulae with Mono cameras.Quad-band OSC filter CWL:1st band, CWL495nm FWHM35nm2nd band, CWL 660nm FWHM 35nm1mm thick optical glass with 30 arc sec parallelism.UVIR Block and Anti-Reflection Coating.
Great product I enquired about the Altair Quadband narrowband filter from support and got helpful and accurate advice on which filter would suit my needs. The item arrived swiftl, is competatively priced and is a great addition to my equipment. Thanks Harrison Telescopes. from a satisfied customer. (13/12/2019) Dave - Doncaster
Fantastic customer service Ordered the filter late Friday afternoon arrived next morning at 09:45,did not expect until Monday,then I got a email from Ed saying the filter might be in the Black Friday sale , It was and I've been given a refund , Thank you Ed and your team for a great service and for the refund ,filter perfect. (08/12/2019) Tom - North Yorkshire
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