Pixco Macro Lens Mount Adapter for MD Lens to Nikon AI Camera Adapter D750 D810A D5 D500 D4s D610 D800 D3300 D5600 D3400 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.