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Black cylindrical lens mount adapter with metallic bayonet mounts and aperture lever

Viltrox

Viltrox EF-M1 Pro Lens Mount Adapter Canon EF/EF-S to Micro Four Thirds

SKU CH-BHER-2N36R

Adapts Canon EF/EF-S lenses to Micro Four Thirds cameras with autofocus, aperture control, image stabilisation support and EXIF data transmission

  • Professional image quality preserved with Canon EF/EF-S lenses on Micro Four Thirds bodies
  • Fast, precise autofocus enables sharp captures with adapted lenses
  • Full aperture control via built-in lever for creative depth-of-field adjustments
  • EXIF data transmission records aperture, shutter speed and ISO for streamlined editing
  • Firmware updates via Type-C port maintain compatibility and enhance performance

Mount Adapter

The Viltrox EF-M1 Pro adapter connects Canon EF and EF-S lenses to Micro Four Thirds camera bodies. It preserves the original optical performance of the lens while enabling electronic communication between the two systems. Photographers can continue using their existing Canon glass on a different platform without losing core functionality. The adapter targets users who want to expand their lens options across mounts.

Thermals and Power

The adapter is a passive mechanical and electronic interface with no active cooling or internal power source. It draws negligible power from the camera body to operate the aperture lever and transmit EXIF data. No heat is generated during normal shooting, and the unit adds no audible noise to the system. Operation is entirely dependent on the camera battery.

Build and Connectivity

A metal lens mount and reinforced bayonet provide a secure, wobble-free connection between lens and camera. An integrated aperture control lever allows manual adjustment of Canon EF/EF-S lenses that lack electronic aperture rings. A USB Type-C port enables firmware updates for improved compatibility and performance. The adapter maintains lens-based image stabilisation and records full EXIF data including aperture, shutter speed and ISO.

How it compares

Measured against everything we stock in Camera Extras & Accessory Packs, at today’s prices. Recalculated every night.

Price $122.99
Pricier than about 79% of the 2,266 comparable items (median $39.99).

Specifications

No published specifications for this item yet.

Questions about this item

How do I attach the Viltrox EF-M1 Pro adapter so the Canon EF/EF-S lens locks securely onto my Micro Four Thirds body?

Mount the adapter to the camera first by aligning its Micro Four Thirds bayonet and twisting until it clicks, then attach the Canon lens to the adapter's EF/EF-S mount; the step users often miss is seating the adapter fully on the body before adding the lens, which prevents misalignment.

What part of the Viltrox EF-M1 Pro will need attention or replacement after extended use?

The aperture adjustment lever and the electronic contact pins are the wear points; keep the contacts clean with a dry brush and avoid forcing the lever so the adapter maintains full aperture control and EXIF data transmission.

What is the first limitation I will hit when shooting continuously with the Viltrox EF-M1 Pro?

Sustained autofocus tracking speed is the limiting factor; the adapter relies on contrast-detection via the camera body, so continuous AF may hunt or lag during long bursts compared to native lenses.

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