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CPL filter from lens distance?
CPL filter from lens distance? I have a Kaiser KR90 ring-light that I use for photogrammetry. I was going to be investing in a good CPL filter for my camera when I realised that the ring light itself has a 77mm threading. The lens itself is 49mm, but I thought maybe I could get a larger lens for the ring-light's thread. Then I wondered if there's any particular issue with hav...
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