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UHC or UHC-E
Hi all, Im currently looking at purchasing a UHC filter to enhance my deep sky observations. Im have a scope with 6" aperture and Im not sure if the Astronomik UHC or UHC-E filter will work best. Does anyone have any opinion on which would work better with the 6" scope? I believe UHC-E filters are for smaller scopes but why is this so?
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