Canon Mount Adapter EF-EOS R for Canon EOS R Full Frame Mirrorless Camera. The standard Mount Adapter EF-EOS R allows EF-S and EF lenses to be used on EOS R cameras.These adapters allow EF and EF-S mount lenses to be used on Canon EOS R cameras, maintaining the same levels of performance and functionality seen on EOS DSLRs. Canon EF/EF-S Lens to EOS R Camera Maintains AF and Image Stabilization Dust- and Water…