Hi. Yes it is suitable , in fact , that's the very camera I'm using it on. It rather depends what you mean by 'fully'. The camera will not use any of it's auto features because the lens is totally manual , there is no metering and also the focus aids don't work. However , the camera takes pictures with a tamron lens perfectly well . Set it to 'M' on the dial and then set your own shutter speed and aperture . It will look a little dark through the view-finder ( at least it does on my 135 telephoto lens ) but the pictures come out fine . 

I bought this to use on my Nikon. The lens I wanted to use is the adaptall 2. This does work. But remember that you have to use "manual" mode for apature, focus and s/speed. 

I bought this to use on my Nikon. The lens I wanted to use is the adaptall 2. This does work. But remember that you have to use "manual" mode for apature, focus and s/speed. 

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 

No Allen wrench comes with the unit and I did not need one. Mine did not require any adjustments and fit like a glove. 

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. 

Yes, it is indeed Nikon f mount. 

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.