Neewer Alumium Alloy Bayonet Electronic Contact Auto-focus Lens Mount Adapter for Canon EF/EF-S Lens to Sony E-mount Cameras such as A7 A7S/A7SII A7R/A7RII A7II Firmware 1.0 A6000 A6300 NEX6 A7 II firmware updating program Version 2.00, adjust AF contrast in camera AF system. Strict and high standard processing, this adapter adopts pure gold-plated pins for better communication with your camera. Aluminum alloy is used for this product as the base of good quality. Using hard chromium plating to ensure stability and durability for metal bayonet, also to protect your camera mount from abrasion caused by frequent lens shifting. Electronic contacts make available the function of Auto Focus, Auto Aperture and Auto Exposure Control for enhanced using experience. Industrial standard 1/4" screw thread for utilization of tripod, leaving you with more freedom when shooting with your camera.