M42 to all for Nikon AF mount adapter ringMake M42 mount lenses (for Zeiss, Pentax, Praktica, Mamiya, Zenit) can be used on FOR Nikon camerasThere is no ROM connection on the ring so diaphragm control of the lens is set manuallyIt is possible to use Macro rings and other accessories, never usedMade of aluminium (not plastic)color : BLACKNOTICE: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 lensdoes not have the ability to have its aperture controlled by the camera body.You can shoot with manual mode or aperture priority mode .Suitable For Nikon DSLR and Film SLR(as long as the body takes for NIKON AF lens)Package includes :M42-AI step up lens Adapter X 1pcs Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.