ALFCLRGBRD31

FCLRGB-RD31

Alpine Astronomical

This Baader CMOS Optimized LRGB Bandpass Filterset, from Alpine Astronomical, includes all three RGB filters plus the UV-IR Bandpass L filter.None Reflex-Blocker coatings offer largest ever freedom from halos, even under most adverse conditions concerning aux-opticsProvides increased contrastIdentical filter thickness to existing standards (2mm), with utmost care for parfocalityFWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and S/N ratioBlackened edges all around, with filter-lead side-indicator in the form of a black frontside outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filterEach filter coated individually, with sealed coating edge (not cut from a larger plate with coatings left exposed)Life-Coat evermore hard coatings enable a non-aging coating for life, even in the most adverse environments