ALFCG2U

FCG-2U

Alpine Astronomical

This 2" Round, Unmounted Baader CMOS-Optimized RGB-G Bandpass Filter For FCCT, from Alpine Astronomical is an anti-reflection RGB filter with extremely high transmission of the G color channel. Its balanced RGB design allows subframes to be taken with the same exposure time, making it ideal for automated imaging tasks. It features a Reflex-Blocker hard coating, which has been planeoptically polished, and has Life-Coat sealed coating edges. It is equally suitable for modern CMOS sensors as well as for older CCD camera technologies.None 47.4mm filter removed from filter cell, specially selected for use with 2" Filter sliders of the Baader FCCT (Filter Changer Camera Tilter) for RASA 8 and QHY cameras Reflex-Blocker coatings offer largest ever freedom from halos, even under most adverse conditions concerning aux-optics Provides increased contrast Identical filter thickness to existing standards (2mm), with utmost care for parfocality FWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and S/N ratio Blackened 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 filter Each filter coated individually, with sealed coating edge (not cut out of a larger plate with coatings left exposed) Life-Coat: evermore hard coatings to enable a non-aging coating for life - even in a most adverse environment