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My friend Oggie Golub, also known as LunarFox on cloudynights.com, will also test filters for free and he has tested quite a few and the results are here:...

I've been studying and lab testing nebula filters for the last few years, borrowing about ten and buying about 40 of them.
Field studies resulted in some preferences that were born out by the lab...

I've been studying and lab testing nebula filters for the last few years, borrowing about ten and buying about 40 of them.
Field studies resulted in some preferences that were born out by the lab...