Canon EF to Sony E-Mount Speed Booster

Description   Key Features With auto-focusing function Can increase the lens 1 f-stop. Increasing the amount of light in the virtual background can better highlight the theme. Reduced imaging focal length. the actual focal length after using EF-E for 0.71 times the focal length. Let apps-c cameras can take photos as full-frame cameras.     Electronic Fast contrast-detection AF on all E-mount cameras (except AF-S/DMF with Sony A9). Pure phase-detection autofocus support on A7RII. A7II. A6500. and A6300 (the fastest). Powered by the camera body. No external power source is required. Supports image stabilization (IS) lenses. EXIF support (focal length. aperture. lens name).     This adapter condenses the light from a lens designed for 35mm film or "full-frame" camera sensors and projects it onto a Sony E-mount camera's APS-C sensor. This allows the APS-C sensor to utilize more of the light gathered by a connected lens. which effectively reduces the crop factor