RF lenses are at the heart of the EOS R System. A system designed with a beautiful balance of optical, mechanical and electronic excellence with full-frame Canon RF lenses built with faster autofocus and high-speed communication between the camera and lens. For those that like to switch kits, keep using your EOS R camera with your EF-S and EF lenses using the EF-EOS R mount adaptor, which allows EF-S and EF lenses to be used on EOS R cameras. Bestselling RF lenses include the RF 35mm f/1.8 IS Macro STM Lens, RF 28-70mm f/2L USM Lens and RF 24-105mm f/4L IS USM Lens.