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Black metal lens adapter with glass elements, Canon EF to Micro Four Thirds mount, 0.71x focal reducer

Viltrox

Viltrox EF-M2 0.71x Lens Mount Adapter camera accessory

SKU CH-RADD-VNDDZ

A 0.71x focal reducer adapter that mounts Canon EF lenses to Micro Four Thirds cameras, brightening the image by one stop and widening the field of view while supporting autofocus

  • 71x focal reducer adds one stop of light for brighter low-light images
  • Compresses full-frame view to M43 sensor giving wider angle for landscapes and groups
  • Four-group, five-element optics maintain sharpness and reduce distortion for professional results
  • Built-in autofocus support enables quick, precise focusing on fast-moving subjects
  • Adapts Canon EF lenses to Micro Four Thirds cameras expanding creative lens options

Viltrox EF-M2 adapter for Canon EF to Micro Four

The Viltrox EF-M2 0.71x adapter lets you mount Canon EF lenses on Micro Four Thirds cameras. It incorporates a focal reducer that multiplies the focal length by .71 and adds one stop of light. Four optical groups with five elements preserve sharpness and keep distortion low. Autofocus and electronic aperture control remain functional.

Light transmission and optical performance

The .71x reducer concentrates the image circle onto the smaller sensor, brightening the scene by one full aperture stop. This makes low-light shooting easier and permits faster shutter speeds. The five-element optical design is built to maintain resolution across the frame. No active cooling or power draw is involved.

Expanded creative options

The adapter effectively widens the field of view, turning standard EF lenses into wider-angle tools for landscapes or group work. Autofocus support keeps moving subjects sharp without manual intervention. Electronic aperture control lets you adjust depth of exposure from the camera body. Photographers and videographers gain more lens choices without changing systems.

Highlights

  • 71x focal reducer adds one stop of light for brighter low-light images
  • Compresses full-frame view to M43 sensor giving wider angle for landscapes and groups
  • Four-group, five-element optics maintain sharpness and reduce distortion for professional results
  • Built-in autofocus support enables quick, precise focusing on fast-moving subjects
  • Adapts Canon EF lenses to Micro Four Thirds cameras expanding creative lens options

Specifications

No published specifications for this item yet.

Questions about this item

How do I attach the Viltrox EF-M2 to my Micro Four Thirds camera and Canon EF lens without damaging the electronic contacts?

Align the red dot on the adapter with the camera mount, twist clockwise until it clicks, then mount the Canon EF lens to the adapter's front flange; keep both sets of gold contacts clean and avoid forcing the lock if resistance is felt.

What maintenance will the Viltrox EF-M2 need over time to keep autofocus working reliably?

Periodically clean the electronic contacts on both the camera and lens sides with a dry microfiber cloth, check the aperture lever moves freely, and store the adapter with caps on to prevent dust on the internal glass elements.

At what point does the 0.71x focal reducer show optical limits during extended video recording?

During long takes the adapter's four-group, four-element glass can warm up, slightly shifting focus; allow cool-down breaks if focus drift becomes noticeable on critical work.

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