This lens mount adapter is mainly used for connecting the " Nikon AI Lens" to "cameras with Sony NEX mount".Features:This lens mount adapter is mainly used for connecting the " Nikon AI Lens" to "cameras with Sony NEX mount".Completely manual control?∨ manual focus and manual exposure.There is no electrical connection on the ring so diaphragm control of the lens is set manually.It can focus to infinity.Easy and smooth to install?∨ remove and operate lens.With lock and stop pin.Made of high-quality metal?∨ durable for long time use.Specifications:Material: MetalColor: BlackCompatible Lens: for Nikon AI lensCompatible Camera: for Sony NEX mount cameraItem Weight: Approx.99g / 3.5ozItem Size: Approx.6.5 * 6.5 * 3.2cm / 2.6 * 2.6 * 1.3inPackage Weight: Approx.108g / 3.8ozPackage Size: Approx.7.3 * 7.3 * 3.8cm / 2.9 * 2.9 * 1.5inNote:Please make sure that the adapter ring fit for your camera before you bid this item.You need to set the camera to shooting without lens mode first?∨ then it can be able to work with the lens mount adapter. Package List:1 * Adapter Ring