Really great lens adapter so far. Works excellent with my canon fd lenses allowing the aperture to easily be opened or locked on my a6000. Quality construction. Good value.

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

Lock ring is annoyingly easy to twist considering FD is one of the more secure legacy mounts, but the clearances are nice and snug on an a6500 with all the FD lenses I’ve tried. Haven’t noticed any odd distortions or severe vignetting/leaks so all things considered well worth the money.

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

It works well. Read other reviews and questions here on Amazon before ordering so I knew how to install on my Canon FD 55mm 1.4 lens. I use it on a mirrorless Sony a6000. Used it in fully manual & aperture priority with success. Aperture priority was easiest and focusing with manual focus assist & peaking level at high.For me, I will buy again for another FD lens rather than use one adapter for multiple lenses. It's easy enough but does take time.

I use this with a Canon FD 50mm 1.4 lens. It fits on the lens perfectly. The fit onto my Sony 

Best adapter for the money. Tried others and had mounting issues. Some were too loose on certain lenses while the others almost required a chisel to disassemble.

Once I tightened some screws on the face plate it worked like a charm,,,a nice fit. Quite odd that it came the 3 loose screws though..

This is a great adapter that allows me to use a Canon FD 50/1.4 lens with my Sony a7s. Use the mechanism of your Canon FD lens to attach the lens to the adapter and make sure that the aperture/diaphragm control pin lines up appropriately with the mechanism for adjusting it on this adapter (it will feel like it has the correct "click" in when you do that and will easily mount).Once attached and placed on your camera, this adapter along with the Canon FD aperture open/closed feature allow you to focus wide open and then immediately close down to your desired f-stop using the "Lock <==> Open" ring on the adapter. That is a fantastic option to have for a manual focus lens and really assists with precisely positioning the focus point and with focusing in low light if you want to shoot stopped down. This feature alone, which I believe is unique to FD mount lenses, is a good reason to give preference to using FD lenses with the Sony a7 series. (My 35-70 zoom, however, is right now a Minolta, but this feature makes me think about using Canons also excellent 35-70 FD zoom).My first copy of this did have a significant amount of "play/wiggle" and eventually came undone. I should have contacted the seller (HiShop) immediately. I ended up contacting them via the "question about return" policy option *after* the return period had expired. They graciously replaced my adapter with a new one that works great and has no wiggle. I am very pleased with the product.

Works great for a budget. Fit an old canon FD lens on my Sony A7