Signstek Newest Version Electronic Auto Focus EF-NEX EF-EMOUNT FX Lens Mount Adapter for Canon EF EF-S Lens to Sony E Mount NEX 3/3N/5N/5R/7/A7 A7R Full Frame Auto-focus function; Built-in hand-shaking IS function. 1/4 Female thread screw for mounting onto the tripod. 6 monthes warranty. Full-frame adapter aperture hole design, perfectly support Sony full-frame camera. Zinc alloy core makes adapter strong and powerful. Gold-plated pins brings the great conductivity of signal transmitting. "Made in Originally Factory with Logo, quality guaranteed". Aperture exactly being adjusted via the mount adapter. Please note: please set your Sony camera APS-C Size Capture to " off" if you get your lenses to function as full frame. Also,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. Comparing with the normal manual adapter, it brings you more exact Aperture adjustment guide and using convenience. Making your image much more flexible and professional. Canon Zooming Lens Canon Fixed Focal Lens Sigma DC * Compatible lens: Canon EF series lens * Compatible Cameras: NEX-3C NEX-5 NEX-5R NEX-5R NEX-5C NEX-6 NEX-7 NEX-F3 VG20 VG30 VG900 FS700 * Front mount: Canon EF mount * Rear mount: Sony E mount * Tripod screw: 1/4 screw * Max. diameter and length: 66.6 x 26.0 MM * Weight: 175g * Color:Black * Compatible Lens: Canon Zooming LensCanon Fixed focal Lens and other lens 1xAuto Focus Adapter 2x Unit Cover