Lens adapter compatibility

Leica M lenses on Canon EF-M cameras

Can you use Leica M lenses on Canon EF-M cameras? Yes, with a simple mechanical adapter (manual focus). The Leica M flange distance is 27.80 mm and Canon EF-M is 18.00 mm, a difference of +9.80 mm.

+9.80 mm

Space for the adapter

27.80 mm

Leica M flange

18.00 mm

Canon EF-M flange

Verdict: Yes — a simple 9.8 mm adapter keeps infinity focus.

What to expect#

Aperture control: these are mechanical lenses with aperture rings — set the aperture on the lens and shoot in aperture-priority or manual.

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 1.6× crop Canon EF-M body a 50 mm Leica M lens frames like 80 mm. A focal reducer (“speed booster”) can bring back some width and gain about a stop of light.

Leica M lenses you could adapt#

Canon EF-M cameras#

Other systems for Leica M lenses#

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

Frequently asked questions#

Will Leica M lenses autofocus on Canon EF-M?

No — adapted lenses are manual focus on this combination.

Does a Leica M to Canon EF-M 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