Feature: 1. Auto-focus function. Aperture exactly being aligned via the mount adapter. 2. Built-in IS function. 3. Zinc alloy core makes the adapter strong and powerful. 4. Gold-plated pins brings the great conductivity of signal transmitting. 5. 1/4 Female thread screw for mounting onto the tripod. Specification: Features: Support for SONY A7 / A7R II high-speed and low-speed AF focus mode. Auto-focus function. Aperture exactly being aligned via the mount adapter. Built-in IS function. Full-frame adapter aperture hole design, perfectly supports 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. Specification: Compatible lens: for Canon EF series lens Compatible cameras: for Sony NEX series with E-mount (Including Sony NEX full-frame camera A7/A7R) Front mount: for Canon EF mount Rear mount: for Sony E mount Tripod screw: 1/4 screw Max. diameter and length: 66.6 * 26.0mm Item size: 8 * 6.6 * 3cm / 3.1 * 2.6 * 1.2in Item weight: 120g / 4.2oz Package size: 10.2 * 9.3 * 5.3cm / 4.0 * 3.7 * 2.1in Package weight: 285g / 10.1oz The current tested compatibility: for Canon Zooming Lens Canon Fixed Focal Lens Other Brands EF 8-15/4L USM fisheye EF 100/2.8 USM macro Sigma DC 17-70/2.8-4 DC OS HSM EF 17-40/4L USM EF 135/2L USM Sigma DC 30/1.4 DC HSM EF 70-200/2.8L IS USM II EF 200/2.8L II USM Tamron SP 24-70/2.8 Di VC USD EF 70-200/4L USM EF 300/2.8L IS USM Tamron SP 70-200/2.8 Di VC EF 70-200/4L IS USM Extender EF 1.4x III EF 20-35/2.8L (Ver.18) EF 14/2.8L II USM EF 22-55/4-5.6 USM EF 24/1.4L II USM EF-S 18-55/3.5-5.6 IS EF 24/2.8 IS USM EF 28-80/3.5-5.6 II EF 35/1.4L USM EF 28-90/4-5.6 III EF 50/1.2L USM EF 35-350/3.5-5.6L EF 50MM 1.8II EF 70-300/4-5.6L IS USM EF 85/1.2L II USM EF 70-300/4-5.6 IS USM EF 85/1.8 USM EF100-300/5.6 (non-L, not USM, push-pull zoom ) (Ver.18) Extender EF 2x (mark I) EF 100-400/4.5-5.6L IS USM EF-S 60/2.8 macro USM EF-S 10-22/3.5-4.5 USM EF-S 17-55/2.8 IS USM EF-S 17-85/4-5.6 IS USM EF-S 18-55/3.5-5.6 etc. etc. etc. Note: It is not compatible for SIGMA art 24-105/Canon EF 24-70/2.8L USM II/Canon EF-S 18-135/3.5-5.6 IS. Package list: 1 * Auto Mount Adapter 1 * Front Cover 1 * Rear Cover 1 * User Manual Package List: 1 * Auto Mount Adapter 1 * Front Cover 1 * Rear Cover 1 * User Manual