Great adapter and easy to use. I've purchased 2 so far and they are indefensible in working with older lens.

OK, here's the deal. As the other reviewer said, the infinite focus overshoots a bit. However, with focus peaking on my Sony, this really isn't a problem. You just have to follow the focus peaking and not your instinct to "crank it up to 10" if you want to focus to infinity. I think it's very difficult to make an adapter that can agree with all infinite focus ranges of all Canon FD lenses, because I was disappointed with a Speedbooster in this regard. Some lenses just wouldn't reach infinity on that $400 piece of gear. Better to give you the option of overshooting than undershooting and never reaching infinity.However, I give it five stars because for the price, the thing is SO DARN WELL MADE. Both mounts are rock solid. It feels like a much more expensive piece of gear. And, now the real kicker...the aperture control dial is SUPER smooth. Smoother than the Speedbooster! I was considering "declicking" my FD lenses for video production, but with this I don't think it will be necessary. If you just set a minimum aperture, say f/8, you can smoothly rack the 50 1.4 between "open" and "lock" to vary the aperture from f/1.4 to f/8. It takes a bit of practice but you can do it slowly, and smoothly, enough that you don't see noticeable quantization of the camera's exposure.

I'm not entirely sure what the previous customer is referring to in regards to infinity focus, but as for my 50mm 1.4 FDn and my 28mm 2.8 FDn lenses, this adapter works exactly as advertised (from macro shots, to infinity shots of the moon and beyond). It's very good quality, the lock/open ring turns smoothly, and the connection to lens/body is tight. Some adapters tend to have a "roughly turning" lock/open ring and/or have a loose connection to the lens/body.There's nothing else to examine in a lens adapter. It's only purpose is to extend the space between the sensor plane and the lens to mimic the distance between the lens and film plane in vintage DSLRs. You really can't mess that up, some do, but this adapter didn't. The logo looks nice and unique too, if you're into that sort of thing.

This is really a great adapter, i use this with an old FL 50mm 1.2 and the aperture ring allows for a click-less aperture control. just set your lens aperture to the smallest aperture (f/16) and set it in "A" mode and voila, you can control the aperture clicklessly from the wheel on this adapter. i have to say that for movie makers this is a pretty awesome feature that usually comes with a great price tag. personally i dont shoot so much in infinity focus so i wont comment on that, but otherwise, i find that K&F make really awesome adapters and the prices is just awesomely right and it fits like a glove and looks just beautiful. you definitely wont go wrong here for the price. thanks K&F for an awesome product at a very fair price!

Nice fit with Canon FD lenses. Went through two more expensive models before getting this one.

Very impressed! Solid build and works perfect with my canon fd 50mm f1.4 onto my Sony A7ii. Comes in a plastic case which is perfect for storage or transportation!

great FD to Sony Adapter respectable packacaging .

Works perfectly for my needs.

Works great! I adapted an old canon fd50mm f1.8 to my sony a7ii and it works perfectly!

I now have 4 of K&F passive adapters and they are super sturdy and reliable.