Fotga Lens Mount Adapter for M39 Screw Mount Lens to Canon EOS EF EF-S Mount 1D X,1D C,5D,5Ds R,6D,7D Mark II/III/IV,60D,70D,77D,80D,700D,750D,760D,800D,1300D,4000D Dslr Camera Smooth surface for effortless mount,infinity focus allowed.The adapters are precision made to insure the perfect fit Made of Aluminum and Plastic,Diaphragm control of the lens is set manually Compatible Cameras: Canon EOS EF/EF-S Mount,5Ds/5DsR,7D MarkII,70D,700D,100D,5D MarkIII,6D, 60Da,650D Camera etc. Compatible Cameras Lens: M39 Screw Mount Lens The adapter allows you to attach your Canon EOS EF EF-S mount camera to lenses that have a M39 Screw mount