The Fotodiox Pro Lens Mount Adapter provides versatility and affordability by allowing you to use your favorite lenses on almost any of your cameras. Made with Precision, award standards to ensure the perfect fit for your camera and lens which helps it to endure professional use. The 'no-play' design creates a secure fit that enhances and maintains a professional appearance. Automatic diaphragm, auto-focusing, and other functions will not operate automatically while using this adapter as it is not electronic. In this case, "stop-down mode" will need to be used when metering since the lens does not have the ability to have its aperture controlled by the camera body. Infinity focusing is allowed. As with all Fotodiox Pro series adapters, these adapters have been specially crafted to endure professional use. The leaf spring design in the adapter holds the lens tight to the camera body ensuring there is no play between the camera and the lens. The all metal design and polished surface is designed to guarantee a smooth mounting and long lasting experience. The Fotodiox Pro Contax G to Canon EF-M lens mount adapter will fit all Contax G Mount Lenses to a Canon EF-m Camera such as the Canon EOS M Digital Camera. Actual product packaging and contents may differ from image shown due to packaging or product updates by manufacturer.