EF / EF-S Lens to E-Mount Camera Mount Adapter 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/A7R/A7RII/A7RS.