Commlite new-generation electronic lens mount adapter CM-EF-NEX is mainly used for connecting the Canon EF series lens to Sony NEX series cameras with E-mount. Meanwhile, Commlite utilizes the new electronic technology, which can make the aperture exactly being aligned via the adapter, and adjusted for auto-focus. It enhances the convenience of controlling the Canon EF series lens on Sony micro-single camera bodies in the electronic way. Besides, the aperture hole of the adapter design is based on the full-frame NEX camera, which help perfectly support the Sony NEX full-frame camera A7 and A7R. Features: Auto-focus function; Aperture exactly being adjusted via the mount adapter; Built-in hand-shaking IS function; Full-frame adapter aperture hole design, perfectly support Sony full-frame camera A7/A7R; Zinc alloy core makes the adapter strong and powerful; Gold-plated pins brings the great conductivity of signal transmitting; 1/4 Female thread screw for mounting onto the tripod;