Thread: Using a L-Pro/Extreme on a 533MC Pro
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Old 02-09-2021, 04:58 PM
AdamJL
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Join Date: Sep 2010
Posts: 2,154
Yes it impacts backfocus less than 1mm or so. The rule is generally 1/3 the thickness of the filter. The L-Extreme is about 1.8mm thick.
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