Double check it to be sure that it is not your lenses, for example I checked my old manual Nikon lenses and I found out that some of the metal parts on the back of the lens comes very close to the chip contacts.
Non of my passive Nikon to EOS mount adapters have anything sticks out close to the chip contacts.
Non of my passive Nikon to EOS mount adapters have anything sticks out close to the chip contacts.
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