Hi Peter,
I have recently purchased an Astronomik UHC from a forum member and I'm hoping to receive it today or Monday. I can't provide you with a 6" perspective but I will be sure to let you know my thoughts through my 10" newt. I decided on the narrower band of the UHC over the UHC-E. I imagine the UHC-E is recommended to smaller scopes as it has a larger spectrum i.e allowing more light through. Are you looking at using the filter for visual or AP purposes?
I'll be sure to reply when I have a chance to field test.
Ryan.
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