Henchman Posted May 6, 2021 Share Posted May 6, 2021 I have 2 Voigtlander Ultron 40mm f/2 SL II Lenses. One is EF one is Nikon. For some reason the EF will not focus with my BMPCC 4k. I've tried both a speedbooster and passive adapter. What could the problem be? Link to comment Share on other sites More sharing options...
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