UHC Filter - 1.25 Inch -
Lumicon UHC Filter The original Lumicon Ultra-High-Contrast narrow bandpass filter (24nm) isolates just the two doubly-ionized oxygen lines (496 and 501nm lines) and H-beta line (486nm) emitted by planetary and most emission nebulae, while blocking, com
LF-UHC05 - Lumicon -