I had trouble finding info on whether this adapter would work to connect Blackmagic Design Micro Studio 4K cameras with Canon EF/EF-S lenses. Since the Blackmagic cameras can be remote controlled from their ATEM switchers, I was looking for an EF->MFT adapter that would retain the electrical connection to the lens.The Fotodiox documentation for this adapter states that it does not work with Blackmagic Design cameras, but I ordered it anyway to test it out. I'm happy to report that both focus and aperture (iris) control work with the Canon lenses I have available. I verified with both a Canon EF 70-200 f/4 L and a Canon EF-S 17-55 f/2.8.
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