According to Bryan
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According to Bryan
Do you mean a CPL or a UV? If you mean UV, what you need is the B+W XS-PRO. That mount is only slightly thicker than the SLIM mount (3.4mm vs. 3mm, while the F-PRO is 5 mm), and the XS-PRO mount has front threads. I use an MRC UV in the XS-Pro mount on my 16-35mm II, with no vignetting. Here's the LINK. For a CPL, I do use the SLIM version (I have 77mm and 82mmKäsemann CPLs, and the cap issue doesn't really bother me since I don't leave them on the lens).
Hope that helps...
--John
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