Features:Make M42 mount lenses (for Zeiss， Pentax， Praktica， Mamiya， Zenit) can be used on for Nikon AI 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.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.Specifications:Material: Aluminum alloyColor: BlackSuitable: for Nikon DSLR and Film SLR (as long as the body takes Nikon AF lens)Item size: 6cm / 2.4inItem weight: 6g / 0.2ozPackage size: 7 * 7 * 1.5cm / 2.8 * 2.8 * 0.6inPackage weight: 11g / 0.4ozPackage List:1 * Lens Mount Adapter
