Canon EF-EOS R Mount Adapter - to enhance the range of lenses you can use. Maximise your photographic options. The Mount Adapter EF-EOS R allows EF-S and EF lenses to be used on EOS R cameras seamlessly. Photographers who already have a collection of EF-S or EF optics can invest in the EOS R System confidently, knowing their existing lenses will work as expected. Depth: 116 MM Lens Mount Adapter for EOS R Allows EF-S and EF lenses to be used on EOS R cameras seamlessly Genuine Canon Accessory Height: 125 MM Width: 80 MM