Canon 2971C002 EF-EOS R Lens Mount Adapter

The Canon Mount Adapter EF-EOS R is the standard adapter that lets photographers use their existing Canon EF and EF-S lenses on EOS R series mirrorless camera bodies, including the EOS R, EOS RP, EOS R5, and EOS R6. Unlike third-party alternatives, this is Canon's own adapter, which means it maintains full electronic communication between lens and body. Autofocus — including phase detection AF — image stabilization, and full aperture control all function exactly as they do when the lens is mounted natively on an EF-mount body. There is no optical element inside the adapter, so image quality is unaffected.

Build quality matches what you would expect from Canon's professional accessories. Both the lens-side and camera-side mounts are metal, providing a secure and wobble-free connection even with heavy L-series telephoto lenses. The exterior design is styled to blend visually with EF lenses, and the adapter is dust- and water-resistant to keep pace with similarly sealed camera bodies and lenses in challenging conditions. At just 3.9 ounces and under an inch of added depth, it adds minimal weight and length to your setup. The included soft case, lens dust cap, and camera cover round out a well-considered package for photographers transitioning to or supplementing an EOS R kit with their existing EF glass.