Excellent adapter.FD lens seem to work better on my Sony than the Canon.Great results .

This is a review of the adapter that attaches a Canon-FD mount lens to Sony NEX (E-mount) body.A Canon 50mm F1.8 lens attaches cleanly and firmly to the adapter, and the adapter attaches cleanly and firmly to the camera. When the release button is pressed on the lens, the lens and adapter separate easily, as expected.If the adapter has a drawback it is that it is easy to rotate the "lock-open" ring by accident. This doesn't release the lens but in the "open" position the aperture doesn't close down when the aperture dial is rotated. The worst case situation is that the "lock-open" ring is partially rotated and then the aperture will close partially but not fully. On the other hand this same "lock-open" ring is useful because when used properly it provides, in essence, a binary control for the aperture: In the open position the aperture is wide open giving minimum depth of field and the image is bright and this is ideal for using the Sony NEX focus highlight feature. Then, once the focus position is set, and the aperture will close to whatever position has been set on the lens's aperture ring.I have two adapters to attach Canon FD lenses to Sony NEX bodies. One adapter is branded "K&F" and the other is branded "Beschoi". Apart from the brand texts, the adapters appear to be identical and perform equally.A 35-105mm Vivitar lens does not mount properly onto the adapter, or at least not in a way that gives me confidence it will stay attached. However after much faffing and investigation I found that I had exactly the same struggles attaching the lens to a Canon body, and therefore the adapter cannot be blamed. It is possible that the Vivitar lens is defective in some way but I do not have the experience that would let me be sure. The Vivitar lens has its own mounting lock ring and therefore the mounting operation is a little different to the Canon lens. I mention this only in case somebody else is struggling similarly and wondering which bit, if any, is at fault.

Excellent for mating my grand-dad's Canon 50mm fixed focus to my Sony NEX.

Outstanding adapter for my Canon FD lenses to be mounted on my Sony A7. Fastens securely, doesn't wiggle and holds lenses in place as intended. I purchased 5 of them, to avoid having to re-mount them for each of my FD lenses. Definitely recommended.

Very good adapter, I shoot with multiple FD lenses on my Sony and it works perfectly.

I now own four of these adapters; Leica M and M42, Canon FD and Olympus OM, all to the Sony NEX mount. The build quality of all four is superb and much better that you would expect for the price. The Canon FD version in particular has a ring to lock and unlock the aperture - this is butter smooth and really well damped. Make sure it is set to LOCK when mounting so that the aperture ring works.Mounting surfaces are nice smooth chromed brass or aluminium. We'll see about long-term durability but I expect these to last the distance - top quality.Lastly, though one reviewer appears to have had problems, I can say that contrary to the manufacturer's details all four of these adapters work perfectly on my Sony A7R mk2 - locking securely and with no play.

These are the most consistently excellent low to mid-priced adapters in the market. I now have four of these: the FD, MD, Leica M, and M42. All to Sony E mount. You need to have bought a dozen different cheapies from auction sites to realize how good these are. And I was also gifted a pricey Kipon adapter. And guess what? The K&F is just as good. I don't find the fact that it overshoots infinity a bit. Frankly, I think the distance markings on most cameras are at best rough guidance. I use focus peaking and magnification to do all my serious focusing, and I never use autofocus lenses. And once you've used a lens, it's easy to remember where infinity really is. I'm more bothered by adapters that don't allow you to hit infinity at ALL (common with cheap M42 adapters). These are well built and well finished. Just compare the LM to Sony adapter to the Voigtlander one that sells 10x to 12x the price. I don't see a real difference. Nothing is perfect, but at the price these sell for (around 20 bucks or less) they're totally worth it. Buy two before they figure out they can raise the price.And I only wish they made clones of the LAEA4 autofocus adapter. I bet they could do a spectacular job for under a hundred bucks.

Well finished but on the one I received infinity focus was out with my canon FD lenses. My measurements with an electronic vernier caliper suggest the adapter is 0.25mm too short so infinity is focussed at less than infinity. Anyone else seen this?

I purchased this mount about a year ago so I could use my older 70-150mm Canon FD lens with my Sony a3000 body. I've used it a handful of times now. Overall, it seems to do the job well.I would have given five stars,except that when I used it for the first time the lens had some wobble, as if it did not fit snugly. (The lens is over six inches long when fully extended, so it was very pronounced.) Upon close inspection back at home, I found that all three of the visible screws were loose. I used a precision screwdriver to tighten them, and all appears to be good now.

Excellent adapter very good quality