1、For Contax CY mount lens can be attached to for Nikon Z mount camera body through the adapter ring. 2、Made of high‑quality alloy, sturdy and durable, cover is painted to prevent oxidation and corrosion. 3、Precise processing, tight fitting, precise fitting and no light leakage, and it feels comfortable. 4、The inner wall is treated with extinction to avoid the influence of reflected light on imaging. 5、Almost the same as the original one, a good replacement. and it is not easy to slide when installed. Item Type: Lens Adapter Material: Alloy Color: Black Weight: Approx. 100.0g/3.5oz Type: Fully Manual Adapter Ring Mount: for CY Mount, for Z Mount Compatible Lens: for Contax CY Lens Application: for Nikon Z mount camera , for Nikon Z50/Z6/Z7/Z6II/Z7II camera How to use: 1. Align the identification point of the lens mount with the identification point of the adapter ring and rotate it clockwise. When you hear a "click" sound, it means the lens has been installed in place 2. Align the identification point on the lens adapter ring with the adapter ring to the identification point on the fuselage, and rotate clockwise when you hear a "click" sound, it means it is installed in place 3. Press and hold the camera lens release button and rotate it counterclockwise to remove the lens together with the adapter ring 4. Rotate counterclockwise, the adapter ring can be removed from the lens 1 x Lens Adapter