The Falcon Canon EF Mount Lens to Sony NEX Camera Lens Mount Adapter Mark III from DEO-Tech attaches EF and EF-S lenses to Sony NEX (E-mount) cameras, including cameras with full frame sensors. The adapter retains electronic communication between the camera and lens and enables automatic aperture control, EXIF data, image stabilization and autofocus, including USM autofocus. The adapter is powered by the camera body, so no external power source is required. The Mark III version of this adapter offers a Bluetooth 4.0 wireless firmware upgrade module for easier firmware updates and improved autofocus speeds. An Arca-type removable tripod foot is featured for stability with large lenses.
Some vignetting may occur when using Canon EF-S lenses and autofocus may be slow or non-compatible with some third party EF-mount lenses. On Sony NEX-5 or later model cameras, aperture can be adjusted during video capture.