Olympus OM Lenses to Sony E Lens Mount Adapter K&F Concept M16101 Lens Adapter

SKU: KF06.072

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K&F Concept Nikon to Sony E lens mount adapter you are asking, you said your lens mount is F, and Sony A7 camera mount is E, so this adapter works for your, please trust to purchase. 
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The camera needs to be set to function without an E-Mount lens attached. You can do this by changing the following camera setting: 'Menu' -> 'Setup' -> 'Release w/o Lens' -> 'Enable' (Exact naming and location of this option may change depending on camera model). If your lens does not have a manual aperture control ring, it will stop down to its smallest f/stop by default. 
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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.