Commlite CM-EF-EOS R Lens Mount Adapter - Canon EF/EF-S to Canon RF

The Commlite CM-EF-EOS R is a high-performance lens mount adapter designed to seamlessly connect Canon EF and EF-S lenses to Canon RF-mount mirrorless cameras. This adapter maintains full electronic communication between the lens and camera body, enabling autofocus, aperture control, image stabilization, and EXIF data transfer. Built with a durable aluminum alloy body and gold-plated copper contacts, it ensures reliable performance and longevity. The detachable tripod foot with a standard 1/4"-20 thread adds versatility for stable shooting. Firmware upgradeable via USB, this adapter is an essential tool for photographers transitioning to the Canon RF system.

Advantages

Full autofocus and electronic aperture control support; preserves image stabilization and EXIF data; robust aluminum construction with anti-reflection matte black interior; detachable tripod mount for added stability; firmware upgradeable for future compatibility.

Suitable for

• Photographers using Canon EF/EF-S lenses on Canon RF-mount cameras (e.g., EOS R, R5, R6)
• Users seeking to maintain full lens functionality including autofocus and stabilization
• Professionals requiring a durable, reliable adapter for studio or field work

Key specifications

• Lens Mount: Canon EF / EF-S
• Camera Mount: Canon RF
• Autofocus Support: Yes
• Electronic Aperture Control: Yes
• Image Stabilization Support: Yes
• EXIF Data Transmission: Yes
• Firmware Upgradeable: Yes (via USB)
• Tripod Mount: Detachable 1/4"-20 thread
• Construction: Aluminum alloy body, copper contacts
• Electronic Contacts: Gold-plated
• Optical Design: No optical elements (pass-through)
• Internal Finish: Matte black anti-reflection
• Mount Type: Bayonet
• Colour: Black
• Included Accessories: Front and rear lens caps, detachable tripod foot

Recommendations

For best performance, ensure your camera and lens firmware are up to date. The adapter supports firmware updates via the built-in USB port. Compatible with all Canon EF and EF-S lenses, including third-party options with electronic contacts.