Baader UHC-S 2 inch Optically Polished L-Booster Filter is Premium deep sky nebula filter that is Optically polished for optimum performance. It is excellent for telescope with diameter above 100mm(4"). The high transmission, sharp cutoffs and moderate 60nm passband significantly boosts overall contrast. This is free from halo and ghost effects due to the high quality dielectric and anti-reflection multi-coating. The ultra-thin filter cell results in the maximum possible clear aperture.
Features:
Excellent for telescopes with diameter above 100 mm (4").
Premium deep sky nebula filter that is Optically polished for optimum performance.
The high transmission, sharp cutoffs, and more moderate 60nm passband significantly boosts overall contrast.
The ultra-thin filter cell results in the maximum possible clear aperture.
The filter is free from halo and ghost effects due to the high quality dielectric coating.