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I use this to mount an m42 zenit mirror lens to an EIS R, so it should work for your m42 lens. You will have to change the settings to allow release shutter without lens as there are no data pins on m42 lenses.
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No. You cannot connect RF lenses anywhere but to R series Canon
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Don’t forget that it’s a manual lens adapter. Works with full manual lenses. If your lens has no physical aperture ring, you cannot control it from your camera
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No Allen wrench comes with the unit and I did not need one. Mine did not require any adjustments and fit like a glove.
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Hi, this adapter is for Canon EOS mount lens to Sony E NEX mount camera, we checked the sony a 7iii camera mount is E mount , this adapter can fit it , but you can reconfirme it , thanks.
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Yes, it is indeed Nikon f mount.
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Hi, this adapter is for Canon EOS mount lens to Sony E NEX mount camera, we checked the sony a 7iii camera mount is E mount , this adapter can fit it , but you can reconfirme it , thanks.