If you have a Canon SLR or DSLR camera and Nikon G mount lenses, this Mount Adapters will allow you to use your lenses on the film/digital camera body. Sharing lenses has some distinct advantages. Certain prime lens just can't be replaced, and you save the cost of purchase on new lenses. This Adorama lens mount adapter is made with high standard precision. The leaf spring design in the adaptor holds the lens tight to the camera body ensuring there is no play between the camera and the lens. It's all metal design and polished surface is designed to guarantee smooth mounting and long lasting experiences. This lens mount adapter allows All Nikon lenses, including the Nikon G-type lens with out an aperture ring, to fit on the Canon EOS camera body and still maintain the full control of the aperture adjustment. 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 Canon 1d,1ds,Mark II, III, IV 5D, 5D Mark II, 7D, 10D, 20D, 30D, 40D, 50D, Rebelxt, xti, xs, xsi, t1i, T2i, 300D, 350D, 400D, 450D, 500D, 550D, 1000D