Canon’s EF-EOS R mount adapter gives you the flexibility to shoot with any EF or EF-S lens on an EOS R mirrorless camera. All lens functions of EF and EF-S lenses are supported when shooting with the adapter so there is no loss of AF speed or Image Stabilization ability. Stepping up from a Canon EOS APS-C crop sensor camera? The EF-EOS R Mount adapter will allow you to use your EF-S lenses on an EOS R mirrorless camera. Boasting over 70 lenses covering a focal length range from 8mm to 800mm, the Canon EF lens range covers your every photographic need.