UHC - This is an ultra-high contrast narrow-band filter, designed for observing the broad range of nebulae with 2.0-inch standard eyepieces or filter wheels. The bandpass is tighter than the CLS Nebula Filter, thereby blocking even more light from artificial lights and airglow.
Fits 2" Eyepieces
Range: from 458nm to 508nm with peak at 488nm
Buy risk-free: When it’s time to trade up you’ll get the most value for your used gear.