Baader 7nm Narrowband H-Alpha 2" Filter

CCD imagers will find the Baader Planetarium Narrowband H-Alpha Filter 7nm to deliver the absolute highest contrast deep sky images of H-II regions, with the shortest exposures possible. Its narrow 7nm FWHM bandwidth has a transmission at H-Alpha of over 90%, while completely rejecting light pollution.
SKU: BAA-2458384
Stock Status: AVAILABLE
Shipped under 10 days
$369.95
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Options Available Filter Size: 1.25" H-Alpha Narrowband 7nm Filter, 2" H-Alpha Narrowband 7nm Filter CCD imagers will find the Baader Planetarium Narrowband H-Alpha Filter 7nm to deliver the absolute highest contrast deep sky images of H-II regions, with the shortest exposures possible. Its narrow 7nm FWHM bandwidth has a transmission at H-Alpha of over 90%, while completely rejecting light pollution. The high optical quality of the Baader 7nm H-Alpha filter guarantees no loss in sharpness or contrast. Each substrate is fine-optically polished plane parallel to deliver a smooth and accurate 1/4 wavefront over the entire surface. This special custom polishing operation sets Baader filters apart from the standard commercially precision polished filter substrates used by most other filter manufacturers. Coatings are professionally applied by the most sophisticated equipment available, ensuring high consistency for bandpass centering and transmission. The ultra-hard ionbeam deposition ensures the coatings will never degrade from use or normal cleaning. This filter is available in two sizes, standard 1.25" and a 50.8mm diameter bare substrate (unmounted) for use in SBIG STL cameras.
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