High Precision Lens Mount Adapter for M42 Series Lens to M4/3 Series Mount Camera, M42-M4/3 IV PRO

SKU: KF06.504

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No, no focal length or aperture change. Works absolutely like the Canon original that I use. 
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No, not a transmission of any kind. This is a purely mechanical adapter with no electronic contacts. 
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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.