I bought this adaptor for an old manual focus Vivitar Series 1 90mm Macro lens. This is a superb lens for film or digital and I wanted a lens adaptor which was economical but would work smoothly and retain as many functions of my Canon cameras as possible.I tried a Fotodiox adaptor but the fit was very rough and too snug on my Canon EOS 5D Mk1. And on my Canon EOS 650 35mm film camera it was too loose and would not let the meter read properly. All I got was an "EE" total error. So I took the FOTODIOX back for a refund at the camera store.I found this adaptor by K&F. I don't have any other lens adaptors from this company but heard good reviews. It's a little more than the FOTODIOX. But at only $5 US more it fit my budget. When it arrived I first put it on the EOS 5D body. Perfect fit! Snug and smooth. And more important it UNmounted just as smoothly. Fotodiox product was difficult to remove. But the K&F came off like a Canon lens should.Then I put the Vivitar Series 1 lens on the adaptor. Also perfect! Focused to infinity and perfectly at very close Macro distances as well. Av and Manual mode metered perfectly as well, measured against my Gossen Luna Pro handheld meter.I next mounted both on my 1987 Canon EOS 650 35mm film camera, which I've had since it was new. I still shoot a lot of film for its unique look. I was surprised that the K&F adaptor went on smoothly and retained Av metering-even in Spot mode on this first EOS camera ever made! I like this adaptor so much I'm tempted to replace many of my Fotodiox lens adaptors with their brand. In any case I know that any new lens adaptors I purchase will be made by K&F

I purchased another brand of this adapter and was very disappointed as the fit was loose and, while the adapter locked firmly to the camera body, the lens did not lock firmly to the adapter, resulting in a loose and sloppy fit. I then purchased this product. It is better finished, looks better and fits between the camera body and the lens as though it was OME. I am thrilled to be able to use my large collection of Olympus OM lenses with my Cannon OES Camera. I miss the auto focus but the Digital photos are excellent. I would purchase again but I only need one. Thanks for a great product at a great price.

Well made, inexpensive adapter, easily meets my requirements.

great fit . allows me to use my collection of film lenses on my dslr

Very sturdy. Just know because there is no glass, you cannot focus to infinity. I don't think I could have done better for the price.

Ottimo adattatore, semplice da usare e una volta innestato non si muove , non ha gioco.Ho riscoperto vecchi obbiettivi vintage, sono davvero soddisfatto.

Ottimo adattatore per le vecchie ottiche Olympus su canon eos. Va bene sia per FF che APS-C.Non ha il chip si conferma messa a fuoco ma usandolo solo in LiveView non ne sento la mancanza.La costruzione è ottima (è un pezzo di ferro, ma ben fatto), solido e rifinito.Testato con un Olympus 50 1.8 e un 135 3.5 su canon 6D, permette di ridare nuova vita a ottiche tenute nel cassetto per decenni.

Fits perfectly!

Just what I need. A1.

It is well machined and holds my 500 mm mirror lens securely to the camera.