Solid full metal mount lens adapter allows Mount Lens to fit on EOSR RF mount series Full Frame Mirrorless Camera body.Supports AV / M mode. There is no electronic elements in the adapter, aperture and focusing must be manually control.Although the lens will fit physically, automatic diaphragm, auto-focusing, or any other functions will not operate correctly while using this adapter.Precise fit and solid connection - lens has no play, space or wiggling when mounted on adapter and no adjustments are required to fit your lens.Designed to reach focus while maintaining the correct registration distance required to support lenses or lenses with floating elements.colour:BlackMaterial:plasticPackage Contents:1 x Adapter Ring for to ROnly the above package content, other products are not included.Note: Light 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.