It is a AI/ all mount adapter ring It is easy to install, remove and It is durable and reliable for long-term A useful thing to achieve optimal effect Color: Silver material: metal _x005f_x000D_Allows focusing to . Auto focus () is not available. Lens lock / release and stop screw. Stop- metering is used. Spot metering mode does not work properly. Although it is possible to the A (aperture-priority ) mode in auto exposure, the aperture display is not available. In the P (Program ), or S (Shutter speed-priority ) mode, the shutter releases, but the auto exposure control does not work. The distance scale on the lens might not indicate the actual distance. Please installing / uninstalling the adapter after turning off the camera. The auto focusing system doesnt support as less as F5.6. Before your capturing you have to focusing with MAX aperture and stop to capturing. Made of with chrome coating in silver color. : ALL and Film SLR(as long as the body takes lens) AI Lens Usage: Put red marks of the adapter and lens collar . Turn the adapter clockwise till the fixative click. Set lens Package Include: 1X 1X Adapter Ring Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.