This Fotodiox lens mount adapter is made with high standard precision. The leaf spring design in the adapter holds the lens tight to the camera body ensuring there is no play between the camera and the lens. The all metal design and polished surface is designed to guarantee smooth mounting and long lasting experiences. This adapter also has a built-in aperture control tab which allows for control over the lens iris. This adapter allows Voigtländer Bessamatic / Ultramatic, Deckel-Bayonett (DKL), Kodak Retina Rangefinder and Retina Reflex Lenses to fit on a Canon EOS Digital camera body.Although the lens will fit physically, automatic diaphragm, auto-focusing, or any other functions will not operate correctly while using this adapter. In this case "stop-down mode" will need to be used when metering since the lens does not have the ability to have its aperture controlled by the camera body. You can shoot with manual mode or aperture priority mode. Infinity focusing is guaranteed.Compatible Cameras (including, but not limited to): 1d/1ds, Mark II, III, IV, X, C, 5D, 5D Mark II/III 7D, 10D, 20D, 30D, 40D, 50D, 60D, 60Da, Rebel xt, xti, xs, xsi, t1i, T2i, T3, T3i, T4, 300D, 350D, 400D, 450D, 500D, 550D, 1000DNotes:The aperture markings on the adapter are based on a 50mm f/1.9 lens; when used with any other lens the aperture markings will be off (will not represent the true aperture used), however you will still have full range over the lens iris.The product pictured may have slight differences in appearance from the actual product such as color, font style, and/or other cosmetic changes due to improvements in design.