CONXTRUE EF-MFT Electronic Aperture Control Lens Mount Adapter for Canon EF & EF-S to Olympus PEN E-P1 P2/3/5 E-PL1 OM-D E-M5 Panasonic LUMIX GH2/3/4 M4/3 Camera Designed for Canon EF/EF-S Series Lens to M4/3 camera. Gold-plating contacts ensure excellent transmission effect. Give out EXIF signal, related information will be displayed on camera screen. With auto exposure function, and aperture can be adjusted through camera. Built-in image stability function, help to create smooth and clear shooting. Made of strong and durable aluminum alloy, with a base mount with 1/4" tripod socket.