Features:
EF-NEX adapter is able to adapt EF/EF-M lens to Sony NEX E Mount Camera, which allows you to have more purchasing choices of lens.
Maintain of Auto Focus (AF) function.
Aperture exactly being aligned via the mount adapter.
Full-frame adapter aperture hole design, perfectly supports Sony full-frame camera A7/A7R.
Built in anti-shaking function.
More robust and stronger due to zinc alloy core.
Greatest conductivity due to gold-plated pins for the signal transmitting.
1/4 Female thread screw for mounting onto the tripod. 

Note:
The AF is slow when use for prime lens ,manual focus would be better.

Specification:
Compatible lens: for Canon EF series lens  
Compatible cameras: Sony NEX E Mount Camera (Including Sony NEX full-frame camera A7/A7R)
Front mount: for Canon EF mount
Rear mount: for Sony NEX E mount  
Tripod screw: 1/4 screw  
Max. diameter and length: 7.2 * 8.4cm / 2.8 * 3.3in
Package size: 12 * 10 * 6.5cm / 4.7 * 3.9 * 2.6in
Package weight: 275g / 9.7oz

Package List:  D1486
1 * Lens Mount Adapter 
1 * User Manual(English & Chinese)