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OIII Filter
Not too long ago I got a 2nd hand Lumicon UHC filter and I have been really impressed with it. Eta Carina in particular shows a huge improvement in size and detail.
So I was wondering whether an OIII filter would be useful in my scope and conditions (10" GSO Dob, dark skies, a little white light pollution to the NE)?
Is the 10" a bit small, are the benefits of OIII only for a few objects cf the UHC? Any other comments?
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