Introduction M42 to all mount adapter ring Make M42 mount lenses (Zeiss, Pentax, Praktica, Mamiya, Zenit) can be used on 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 new, never used Made of Metal (not plastic) color : Black NOTICE: 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 Contains Lens mount adapter x1 (made of Metal)With no glass (Original Manufactory Package) Suitable For ALL DSLR and Film SLR (as long as the body takes EF lens)