ALFCOMSURD50

FCOIIIMSU-RD50

Alpine Astronomical

This 50.4mm, unmounted Baader 3.5/4nm f/3 Ultra-Highspeed O-III CMOS Filter from Alpine Astronomical is recommended for extremely fast optical systems from f/3.4 to 2.3 and is particularly designed for the special filter requirements of f/3 optics. The filter features a Reflex-Blocker hard coating, which has been optically polished, and has Life-Coat sealed edges. It is equally suitable for modern CMOS sensors as well as for older CCD camera technologies.