Lens adapter compatibility

Canon EF lenses on Micro Four Thirds cameras

Can you use Canon EF lenses on Micro Four Thirds cameras? Yes — and autofocus can work with the right electronic adapter. The Canon EF flange distance is 44.00 mm and Micro Four Thirds is 19.25 mm, a difference of +24.75 mm.

+24.75 mm

Space for the adapter

44.00 mm

Canon EF flange

19.25 mm

Micro Four Thirds flange

Verdict: Yes — a simple 24.8 mm adapter keeps infinity focus.

What to expect#

Electronic adapters: Metabones/Viltrox smart adapters and Speed Boosters give AF and aperture control; Speed Boosters also widen the view by 0.71×.

Aperture control: lenses with a manual aperture ring work directly; electronically controlled lenses (no ring) need a smart adapter or one with a built-in aperture lever.

Focus: use focus peaking and magnification in the viewfinder. Exposure metering works normally because the camera meters through the lens at working aperture.

Crop factor: on a 2.0× crop Micro Four Thirds body a 50 mm Canon EF lens frames like 100 mm. A focal reducer (“speed booster”) can bring back some width and gain about a stop of light.

Canon EF lenses you could adapt#

Micro Four Thirds cameras#

Other systems for Canon EF lenses#

Sony E-mount Canon RF Nikon Z Fujifilm X-mount L-Mount Canon EF-M Fujifilm G-mount Hasselblad XCD Nikon 1 (CX)Pentax Q

Frequently asked questions#

Will Canon EF lenses autofocus on Micro Four Thirds?

Metabones/Viltrox smart adapters and Speed Boosters give AF and aperture control; Speed Boosters also widen the view by 0.71×.

Does a Canon EF to Micro Four Thirds adapter affect image quality?

A glass-free adapter is just a precisely machined spacer, so image quality is unchanged when it is built to the right thickness. Cheap adapters can be slightly too thin or thick, which shifts the infinity mark.

Last updated October 03, 2026 · How we calculate · Sources