Precision engineering and Canon's legendary optics come together in the Control Ring Mount Adapter EF-EOS R, designed to provide full compatibility between your EF or EF-S lenses and the new EOS R camera. This mount adapter lets you keep all the functionality of your existing lenses, including the control ring that allows for quick adjustments to numerous settings and functions. The click mechanism can be removed for those who prefer silent operation, making this mount adapter ideal for a wide range of shooting styles. With the Control Ring Mount Adapter EF-EOS R, you can rest assured that your lens investment is protected while enjoying the very best in image quality and performance.