Features: Allow M42 42mm screw mount lenses to be used on Canon EOS EF cameras. With AF confirmation 9th generation chip, it could work on most of the Canon DSLR. (except 5D Mark IV and 6D Mark II and above) The ring enables camera viewfinder focus confirmation light and confirmation sound. It can focus to infinity. Stop-down metering can be used. Spot metering mode does not work properly. There is no ROM connection on the ring so diaphragm control of the lens is set manually. Supports AV (Aperture Priority) and M mode. Auto focus (AF) is not available. Material: Aluminium Color : Black Note: Please open the "No lens release" in manual when first use it, otherwise it may can't recognize.
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