Viltrox EF-EII Auto Focus Reducer Speed Booster Lens Adapter for Canon EF EOS Lens to Sony Camera A9 A7II A7RIII A7SII A6500

Feature:With auto focusing functionSuppot CDAF and PDAF focus modelCan increase the lens 3 f-stop, increasing the amount of light into the virtual background, can better highlight the themeReduced imaging focal length, the actual focal length after using EF-E for 0.71 times the focal lengthLet half frame cameras can take photos as full frame camerasAperture can be accurate through ring expansion corresponding actionZinc alloy technology, stable and reliableSignal transmission using PIN gold needle, greatly enhance its transmission performanceRing at the bottom with 1/4 screws, which can easy installed on the tripod or other fixed bracket Notice:1.To update adapter firmware, latest firmware can be download from official website, connect adapter to computer with USB cable and copy the file into adapter memory. Do not required to attach lens or camera. 2.To change AF mode, switch to desired AF mode on adapter, then turn off camera, take out battery, insert battery and turn camera back on again for camera to recognize new AF mode as a new lens. Slow focus will happen on low end lenses in CDAF mode.3.VG series does not support AF. SpecificationsOptical configuration: 4 elements 4 groupsFocus length multiplier: 0.71Tripod socket: Cu 1/4″ * 1Max. diameter and length: 71 * 83mm / 2.8 * 3.3inProduct size: 8 * 6.5 * 4cm / 3.1 * 2.6 * 1.6inProduct weight: 202g / 7.1ozPackage size: 10 * 9 * 6cm / 3.9 * 3.5 * 2.4inPackage weight: 307g / 10.9oz Package List:1 x Viltrox EF-E II adapter1 x Tripod Mount Knob1 x Front Cover1 x Rear Cover