- This adapter allow you to convert Canon EOS EF lens to fit on Canon EOS-M mirrorless camera body. - 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. - Focus: support infinity - Material: aluminium - You can shoot with manual mode or apeture priority mode. - PLEASE SET YOUR CAMERA IN 'SHOT WITHOUT LENS' MODE WHEN YOU USE WITH ADAPTER. Suitable for: - Lens: Canon EOS EF Lens. (Cannot support 50mm 1.8 stm) - Camera: Eos M/M2/M3/M5/M6/M10/M50/M100.