ITEM NAME:1 Piece Focus Lens Adapter Ring for Canon FD to EOS M EF-M Mirrorless Description: Allows for Canon FD lens to be used on EOS M mount camera body. It will allow you to use for Canon FD manual focus lenses on Canon M series mirrorless cameras. It will work on such cameras as M M2, M3, M10 cameras. Smooth surface, strong structure, made of aluminum alloy It allows focus to infinity. It locks on properly and does not wobble. Specification: Material: Aluminum Alloy Color: Black Size: Approx. 64*28mm Suitable For: Lens:Canon FD Lens Camera:for Canon EOS M Mirrorless Camera Package Includes: 1 Piece FD-EOS M Lens Mount Adapter Note: Although the lens will fit physically, automatic diaphragm, auto-focusing, or any other function will not operate correctly while using this adapter. In this case "Stop-down mode" will need to be used when metering since the lens doesn't have the ability to have its apeture controlled by camera body. You can shoot with manual mode or aperture priority mode. SKU: ALU0004568277002474.Lens:Canon FD Lens. 1 Piece FD-EOS M Lens Mount Adapter. Although the lens will fit physically, automatic diaphragm, auto-focusing, or any other function will not operate correctly while using this adapter.