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isolates the two doubly ionized oxygen lines (496 and 501nm) in addition to the hydrogen-beta line (486nm) emitted by planetary and most emission nebulae
Additonal Specifications
the filter is suitable for enhancing the contrast and details for both visual and photograghic purpose at sub-rural area with heavy light pollution
Telescope cloak / dust cover / sun cover for refractors
Add the FLAT61A 1
1.25" UHC Filter for telescope eyepiece - Cuts light pollution deep sky astronomy imaging isolates the two doubly ionizedUHC Ultra High Contrast Filter 1. 25" Telescope Eyepiece Filter High Contrast Cuts Sky Light Pollution The UHC filter is the best all around dark sky nebula filter. It darkens the sky significantly with increased contrast between sky and nebula. The narrowband UHC filter, isolates the two doubly ionized oxygen lines (496 and 501nm) in addition to the hydrogen beta line (486nm) emitted by planetary and most emission nebulae. This filter permits superb
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