EzFoto Canon EOS EF Lens to C-Mount Adapter for Bolex Movie Camera, CCTV or High End Video cameras llows the use of any Canon EOS EF EFs lens to be used on a C mount movie camera, CCTV camera or High End Video cameras Add greater clarity, contrast, and SHALLOWER Depth-Of-Field by using an SLR Lens on your 16mm Movie/ Video Camera All metal design, extremely high quality adapter User can also use M42, NIkon, Pentax, OM, CY, Leica R, T2 mount lens when they have an additional lens adapter, eg. M42-Canon adapter. No electirc contact, ao auto focus, the lens can only use manually