Viltrox EF-E II lens adapter is a upgraded version of EF-NEX IV. By 0.71x shortening focal length, which help to speed up focusing process by 50%. Built-in optical glasses can increase aperture by 3 stops. It is compatible for Canon EF series lens and for Sony E-mount (APS-C) series cameras. It supports auto focus(AF), EXIF signal transmission and USB upgrade. To shoot more wonderful pictures with EF lens, you cannot miss Viltrox EF-E II. Features: Lens adapter for Canon EF series lens to use for Sony E-mount (APS-C) series cameras. Auto focus, support CDAF and PDAF, your focusing process can be quicker or easier. 0.71x multiply the focal length, which help to accelerate focusing speed by 50%. Built-in 4 groups 4 glasses optical , aperture is increased by 3 stops, so you can better distinguish the main object and blur out background. Gold-plated copper contact enhance EXIF signal transmission. Support USB upgrade for sustainable usage. CNC precision constructed aluminum body ensure perfect installation. Specifications: Brand: Viltrox Model: EF-E II Material: CNC Aluminum Lens Compatibility: For Canon EF Series Lenses Camera Compatibility: For Sony E-mount (APS-C) Series Cameras Focus Mode: Auto Focus (AF) Focal Length Multipler: 0.71x Optical : 4 Groups, 4 Glasses Tripod Socket: 1/4" Thread Firmware Upgrade: USB Upgrade Port Diameter and Length: 68 * 28mm / 2.7 * 1.1" Item Weight: 200g / 7.1oz (with covers) Package Size: 11 * 10.1 * 6cm / 4.3 * 4 * 2.4" Package Weight: 371g / 13.1oz Package List: 1 * Lens Adapter 1 * Case 1 * User Manual (English/Chinese) Note: 1. Camera and lens are not included. 2. Please select a certain mode before mounting the lens adapter.