The Canon Control Ring Mount Adapter EF - EOS R is a versatile lens adapter designed to extend the compatibility of your EOS R mirrorless digital camera with EF and EF - S mount lenses. This innovative adapter features a customizable Control Ring, similar to those found on native RF - mount lenses, enabling intuitive adjustments to exposure settings such as ISO, aperture, and exposure compensation. The Control Ring provides tactile feedback for easy recognition and control of your settings. It retains full autofocus and image stabilization capabilities, ensuring that you maintain the original optical quality of your mounted lens. Additionally, the adapter is designed to be dust - and water - resistant, making it suitable for use in various weather conditions, allowing photographers to capture stunning images without worrying about environmental factors.