Description: Camera Lens Mount Adapter Converter Ring with Chip. Compatible with Nikon AF-S G Lens to Nikon AF/MF or Canon EOS EF EF-S. A platform for fixing variety of chips has been designed. The adapter ring with chip can relieve the fatigue of the eyes for a long time. Focus Infinity & 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 so that the aperture of the lens can be enlarged and reduced from the minimum to the maximum, but there is no for the specific aperture value to display on the camera screen. Special Lens Locking Device?for easy loading and unloading, adjusting the aperture lever. Specification: Material?Metal Diameter?64mm/2.52 inch Height?7mm/0.28 inch Package Includes: 1x Lens Mount Adapter Ring