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