The Metabones Canon EF to Sony NEX Camera Lens Adapter (Mark III) features true electronic integration of aperture diaphragm - let camera automatically choose aperture in P or S exposure modes, or dial in yourself on the camera body in A or M modes. It is powered by camera body. No external power source required. The Metabones Canon EF to Sony NEX Camera Lens Adapter (Mark III) also feeatures a wide open button (opposite of depth-of-field preview function) makes manual focusing easy. The tripod foot is detachable and compatible with Arca Swiss, Markins, Photo cam ball heads. It also includes a high performance 32-bit processor and efficient switched-mode power supply.

The Metabones Canon EF to Sony NEX Camera Lens Adapter III is compatible with full-frame Sony camera bodies such as A7, A7R and NEX-VG900.