OVL UV/IR CUTOFF FILTER (1.25")

Planeoptically polished and hard coated! Blocks UV below 400nm and IR above (SII) 680nm. Maximum transmission, scratchproof hard coated.

Blocks night glow and airglow, sodium and mercury emissions (but not UV or IV). 

Designed for CCD astrophotography, the set includes Luminance-IR, Red, Green, and Blue dichroic CCD filters.