This is a high quality Canon FD Lens to Canon EOS Mount Adapter Focus Infinity. You can use this camera adapter ring in conjunction with the camera adapters to complete the connection to a digital camera supporting a filter thread.                                    Features            New and high quality<br>This mount adapter ring which allows CANON FD (Manual Focus) system lenses to be used on your Canon EOS bodies， 35mm or DSLR in stop down mode<br>This is an optical adapter which is actually at the same time also a short teleconverter<br>It can increases the focal lenght and can reduces the lens aperture by approx<br>The auto focusing cann't work with the adapter ring<br>It allows focus infinity<br>Color: Black<br>                                                                                                Package Includes            1 x Canon FD Lens to Canon EOS Mount Adapter Focus Infinity<br>                                                            Extra Info            Compatibility: ALL Canon EOS DSLR and Film SLR. Canon 10D / 20D / 30D / 40D / 50D / 350D / 400D / 450D / 500D / 1000D / XT / XTi / XS / XSi / T1i / 5D / 5D Mark II etc. (as long as the body takes Canon EF lens)<br>