Features: ❀Made of aluminum. ❀Macro shooting, do not support focusing infinity. ❀No ROM connection on the adapter. ❀Diaphragm control of the lens is set manually. ❀Automatic diaphragm, auto-focusing,or any other functions will not operate correctly while using this adapter. ❀"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.