Specifications: It comes without the plate. M42 to all for Canon EOS mount adapter ring. Make M42 mount lenses(for Zeiss, Pentax, Praktica, Mamiya, Zenit), can be used on for Canon EOS cameras. There is no ROM connection on the ring so diaphragm control of the lens is set manually. It is possible to use macro rings and other accessories. Type: Mount Adapter Ring Color: Black Material: High Quality Aluminum Notes: 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. Due to differences in lighting and screen settings, the color of the project may be slightly different from the picture. Package Includes: 1 x Mount Adapter Ring