EF-NEX adapter is able to adapt EF series lens to be used for Sony NEX E mount camera, which allows you to have more purchasing choices of lens. Features: EF-NEX adapter is able to adapt EF series lens to be used for Sony NEX E mount camera, which allows you to have more purchasing choices of lens. Full-frame adapter aperture hole design, perfectly supports for Sony full-frame camera A7/A7R. Greatest conductivity due to gold-plated pins for the signal transmitting. Support for slow auto focus function, TTL, auto exposure and auto aperture. Comes with anti-shake function. Supplied with lens release lever to quick release and install. 1/4 screw to mount onto the tripod. Specification: Compatible lens: for Canon EF series lens Compatible cameras: for Sony NEX E Mount Camera (Including for Sony NEX full-frame camera A7/A7R) Front mount: for Canon EF mount Lens Rear mount: for Sony NEX E mount Camera Tripod screw: 1/4 screw Item Size: 8 * 6.5 * 3cm / 3.1 * 2.6 * 1.2in Item Weight: 190g / 6.7oz Package size: 10.8 * 9.3 * 5cm / 4.3 * 3.7 * 2.0in Package weight: 236g / 8.3oz Package List: 1 * Lens Mount Adapter 1 * User Manual(English Chinese)