Above image shows:
UHC Filter, Visual Back SCT
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List of all products made by
Lumicon
Manufactured by: Lumicon
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 (read more)
