Lens adapter compatibility

Leica M lenses on Canon EF cameras

Can you use Leica M lenses on Canon EF cameras? Not with a simple adapter — infinity focus is lost. The Leica M flange distance is 27.80 mm and Canon EF is 44.00 mm, a difference of -16.20 mm.

-16.20 mm
Space for the adapter
27.80 mm
Leica M flange
44.00 mm
Canon EF flange
Verdict: No infinity focus — the Leica M flange is 16.2 mm shorter than the body's, so an adapter would need corrective glass.

What to expect#

Adapters with an optical element exist for some combinations, but they reduce image quality. A glass-free adapter in this direction only works for macro/close focus.

Leica M lenses you could adapt#

Canon EF cameras#

Other systems for Leica M lenses#

Sony E-mountCanon RFNikon ZFujifilm X-mountMicro Four ThirdsL-MountCanon EF-MFujifilm G-mountHasselblad XCDNikon 1 (CX)

Frequently asked questions#

Will Leica M lenses autofocus on Canon EF?

This adapter direction is not practical.

Does a Leica M to Canon EF adapter affect image quality?

Any adapter that restores infinity focus here needs a corrective lens, which typically lowers sharpness and adds a slight teleconverter effect.

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