The Baader premium-grade 2" UV/IR-Cut/L filter is perfect for full-frame CCD cameras. It works well in fast optical systems from f/10 to f/2.8.
These filters block the Ultraviolet (UV), Infrared (IR) wavelengths. They will not produce halos or reflections. They are highly suitable for producing luminance shots using a black and white CCD cameras.
Also useful in protecting valuable Hydrogen Alpha filters from heat stress and damaging IR.
Baader UV/IR-Cut/L filters feature extremely sharp cutoff at 680nm, leaving all the visible red, including the important 656nm H-alpha emission line. In addition, sharp cutoff below 420nm eliminating violet halos around bright stars; more effective than simpler so-called Minus Violet photographic filters.
The glass substrate is finely optically polished plane parallel, providing 1/4 wavefront over entire surface.
Multi-layer dielectric coatings are plasma-assisted and ion beam-hardened using the latest technology. The Baader Planetarium UV/IR-Cut/L Filter coatings will never degrade from normal use or normal cleaning.
Unmatched 98% Average Transmission. Freedom from ghost images. Very low reflection multi-coating, Striae-free, and plane-parallel substrate.