Commlite CM-EF-EOSR ARC Bayonet Adapter Canon EF to Canon RF with Control Ring

Compatibility and Mounting

The Commlite CM-EF-EOSR ARC bayonet adapter enables the use of Canon EF and EF-S mount lenses on Canon RF mount camera bodies, including models such as Canon EOS R, EOS RP, EOS Ra, EOS R5, EOS R6, and EOS R3. This adapter facilitates fast and secure mounting, allowing photographers to retain their existing EF lenses when upgrading to RF mount cameras.

Innovative Function Ring

This adapter features an ergonomic function ring that can be assigned to control one of the variable exposure parameters: shutter speed, aperture value, ISO sensitivity, or exposure value (EV) compensation. This allows for quick and intuitive adjustments during shooting without needing to access camera menus or screens.

Electronic Communication and Autofocus Support

Equipped with advanced electronic circuitry, the adapter ensures two-way communication between the camera and lens. It supports full autofocus (AF) functionality and image stabilization (IS) systems, maintaining the performance of EF lenses on RF mount cameras. EXIF data such as aperture and focal length are transmitted to the camera for accurate metadata recording.

Build Quality and Design

• Constructed from lightweight aluminum alloy for durability and minimal added weight (105 grams without lens cap)
• Gold-plated contacts enhance electrical conductivity and improve response times
• Compact dimensions: 32 mm length, 67 mm external camera mount diameter, 65 mm external lens mount diameter
• Includes a micro USB port for firmware updates to support new lenses and cameras

Installation and Usage

The adapter allows quick and intuitive installation by attaching it to the Canon RF mount on the camera body, then mounting the Canon EF or EF-S lens onto the adapter. No additional accessories are required, making it convenient for photographers to switch lenses seamlessly.

Included in the Kit

• Bayonet adapter
• Lens adapter
• Decal for the front of the adapter