The T Smart Adapter for Canon EF or Canon EF-S Mount Lens to Select Micro Four Thirds-Mount Cameras from Metabones allows a Canon EF or EF-S mount lens to be mounted onto a Micro Four Thirds-mount camera. While doing so, the adapter is designed to support electronic communication between an attached camera and lens. If the lens includes autofocus, image stabilization, as well as camera-controlled aperture functions, this adapter is intended to allow those features to be used. If an attached lens is also capable of generating EXIF metadata when used with a directly compatible camera, the T Smart Adapter is designed to allow that information to be saved along with image files generated with a combination of the lens, a Micro Four Thirds-mount camera, and the adapter. This item is sold as seen for spares or repair. Please read the description in full before purchasing. Spares and repairs items do not come with a warranty but do represent potentially excellent value. All faults or issues are fully described. Please Note: The EF mount fit is very snug and makes it difficult to mount and unmount a lens.