Versatile Compatibility: VILTROX EF-M1 Pro mount adapter is compatible with EF/EF-S series lens to be used Micro 4/3 series cameras: GH5 GH4 GX7 GF7 GM5, Olympus OM-D E-M1 E-M5II E-M10 III. Please feel free to contact us if you’re not sure whether this lens adapter ring fits your camera. | Auto Focus & Aperture Control: Built with strengthened copper electronic contacts, the EF-M1 Pro adapter will give you a fast speed and a smooth focusing experience. You can also adjust the aperture of the EF/EF-S lens by controlling the M43 series camera body. | EXIF Signal Transmitting & IS Anti-shake Function: The design of gold-plated contacts with great conductivity enhances the EXIF info. Transmission between lens and camera body. IS functions well to prevent the camera body and lens from shaking. It ensures clear and high-quality images while shooting. | Rotating Lock Design: Featuring a rotating lock buckle design, the VILTROX EF-M1 Pro adapter can easily lock your lens, preventing it from slipping or shaking during shooting. it weighs only 175.5g/6.2 oz, easy to carry, and adds zero bulk to your camera. | USB Firmware Upgrade: The USB Type-C firmware upgrade port can upgrade the EF-M1 Pro adapter for greater compatibility, by continuous software updates, VILTROX will help users get a better shooting experience, fix product bugs, and constantly adapt to the new lens, provide more lens and camera combinations.