Features: Suitable for Nikon Z mount mirrorless full frame digital cameras with all Olympus OM mount lenses. This adapter gives you the ability to use your irreplaceable prime lens and saves you the cost of purchasing new lenses. The adapters are precision made to insure the perfect fit. Diaphragm control of the lens is set manually. Made of aluminum and plastic, high quality and compact. Specification: Material: Aluminum + Plastic Weight: Approx.97g/ 3.4oz Size: Approx.6.5*5*3.3cm/2.6*2*1.3in Suitable for:Olympus OM Mount Lens, Nikon Z Mount Camera Z6 Z7 Package List: 1 * Lens Adapter Note: Not suitable for Nikon F mount film cameras or digital SLR cameras and Nikon 1 mount cameras. Please switch both shooting mode and focusing mode to M (manual) before use. Please note 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 doesn't have the ability to have its aperture controlled by camera body. You can shoot with manual mode or aperture priority mode. Set your camera to""shooting without lens""mode. Setting: Put red marks of the adapter and lens collar together. Turn the adapter clockwise till the fixative click. Mostly it will use Manual or Av mode. Removing: To remove the adapter you should demount fixative pin and turn the adapter clockwise. 1、Suitable for Nikon Z mount mirrorless full frame digital cameras with all Olympus OM mount lenses. 2、This adapter gives you the ability to use your irreplaceable prime lens and saves you the cost of purchasing new lenses. 3、The adapters are precision made to insure the perfect fit. 4、Diaphragm control of the lens is set manually. 5、Made of aluminum and plastic, high quality and compact.