Description: Camera Lens Mount Adapter Converter Ring. Compatible with Nikon AF-S G Lens to Nikon AF/MF or Canon EOS EF EF-S. Allow Focus Infinity and manual focusing. Manual Adjustment?This adapter ring is used to manually push the silver handle on the adapter ring to drive the rotation of the G-type aperture lever, but there is no for the specific aperture value to display on the camera screen. Metal structure and smooth surface for effortless mounting. Specification: Material?Metal Diameter?64mm/2.52 inch Height?9mm/0.35 inch Package Includes: 1x Lens Mount Adapter Ring