The FotodioX Macro Focusing Helicoid allows a Nikon G or DX lens to be used as macro lens with variable magnification ability on a Canon EOS DSLR camera body. It features a leaf spring design to hold the lens tightly to the camera body, ensuring there is no play between the camera and the lens. In addition, the helicoid features an all metal design and a polished surface for smooth mounting. Although the lens will fit physically, automatic diaphragm, auto-focusing, and 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. You can shoot with manual mode or aperture priority mode.
Canon 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, and 1000D Camera Bodies