Canon EF-EOS R Control Ring Mount Adapter Lens Adapter

Connect Canon EF and EF‑S lenses to Canon RF‑mount cameras using the Lens Adapter Canon EF‑EOS R Control Ring Mount Adapter. The adapter preserves autofocus performance and image quality while adding a programmable control ring that lets you adjust settings such as aperture, shutter speed, ISO or exposure compensation directly from the adapter without taking the camera away from your eye. The adapter is weather‑sealed against dust and moisture and has a compact, portable design with a length of 24 mm and a weight of 130 g.

Advantages

The adapter provides full mechanical and electronic compatibility between EF/EF‑S lenses and EOS R cameras, maintaining autofocus and image data transmission. A programmable control ring offers quick, tactile access to commonly adjusted camera parameters. Weather sealing protects against dust and moisture, and the adapter’s compact 24 mm length and 0.13 kg weight make it easy to carry and use on location.

Suitable for

• Photographers who own Canon EF or EF‑S lenses and want to use them on EOS R bodies
• Users who need quick adjustment of aperture, shutter speed, ISO or exposure compensation via a control ring
• Outdoor and location shooting where dust and moisture resistance is required

Key specifications

• Compatibility: Canon EF and EF‑S lenses to Canon RF‑mount (EOS R) cameras
• Control: Programmable control ring for camera settings
• Length: 24 mm
• Weight: 0.13 kg (130 g)
• Colour: Black
• MPN: 2972C005
• EAN: 4549292115710

How to use

Mount the adapter onto your EOS R camera’s RF mount, then attach a Canon EF or EF‑S lens to the adapter. Use the camera menu to assign a function to the control ring (for example aperture, shutter speed, ISO or exposure compensation). Adjust the assigned parameter by turning the control ring while holding the camera at eye level; normal autofocus and electronic communication between camera and lens remain active.

Recommendations

For reliable operation, ensure firmware on both camera and adapter (if applicable) is up to date. Clean mount contacts and keep the adapter’s seals free of debris to maintain weather resistance.