Canon ef lens to mft camera
auto-focus function and inbuilt electronic contacts
- focal length multiplier is 0.71x. equivalent focal length = focal length x 0.71, which helps enlarge 1 stop aperture
- support aperture adjustment, exif signal transmission and usb port for firmware upgrade - made of high quality metal with surface plating treatment, very durable and sturdy
- gold-plated pins bring great conductivity of signal transmitting