Attaching/Detaching EF/EF-S Lenses

All EF and EF-S lenses can be used by attaching an optional Mount Adapter EF-EOS R. The camera cannot be used with EF-M lenses.

Attaching a Lens

  1. Remove the caps.

    • Remove the rear lens cap and the body cap by turning them as shown by the arrows.
  2. Attach the lens to the adapter.

    • Align the red or white mount index on the lens with the corresponding mount index on the adapter and turn the lens as shown by the arrow until it clicks into place.
      • (1) Red index
      • (2) White index
  3. Attach the adapter to the camera.

    • Align the red mount indexes (3) on the adapter and camera and turn the lens as shown by the arrow until it clicks into place.
  4. Set the lens’s focus mode switch to AF.

    • AF stands for autofocus.
    • MF stands for manual focus. Autofocus will not operate.
  5. Remove the front lens cap.

Detaching a Lens

  1. While pressing the lens release button, turn the adapter as shown by the arrow.

    • Turn the lens until it stops, then detach it.
  2. Detach the lens from the adapter.

    • Hold down the lens release lever on the adapter and turn the lens counterclockwise.
    • Turn the lens until it stops, then detach it.
    • Attach lens caps to the lens you removed.

Caution