1. AF Autofocus: Dual focus mode, PDAF phase focus/CDAF contrast focus, two modes, switching in one second. Supports realtime tracking and video realtime eye focus functions to track subjects in real time and improve the overall stability of shooting. 2. Supports IS Image AntiShake Technology: After the EFSE adapter ring is adapted to a lens that supports antishake function, it will still maintain its function and improve its shooting stability. 3. Supports Aperture Adjustment: The EFSE automatic adapter ring has builtin electronic s and data chips, which can effectively and quickly adjust the aperture on the body. 4. USB Firmware Upgrade: Builtin USB firmware upgrade interface, which can be compatible with models and lenses after upgrade, solving compatibility issues. EXIF information transmission can record the shooting information and data of the photo, and supports the camera body and picture software to view aperture, shutter, ISO and other information.