Lens adapter compatibility

Canon FL lenses on Canon EF-M cameras

Can you use Canon FL lenses on Canon EF-M cameras? Yes, with a simple mechanical adapter (manual focus). The Canon FL flange distance is 42.00 mm and Canon EF-M is 18.00 mm, a difference of +24.00 mm.

+24.00 mm
Space for the adapter
42.00 mm
Canon FL flange
18.00 mm
Canon EF-M flange
Verdict: Yes — a simple 24.0 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 Canon FL lens frames like 80 mm. A focal reducer (“speed booster”) can bring back some width and gain about a stop of light.

Canon FL lenses you could adapt#

Canon EF-M cameras#

Other systems for Canon FL lenses#

Sony E-mountCanon RFNikon ZFujifilm X-mountMicro Four ThirdsL-MountFujifilm G-mountHasselblad XCDNikon 1 (CX)Pentax Q

Frequently asked questions#

Will Canon FL lenses autofocus on Canon EF-M?

No — adapted lenses are manual focus on this combination.

Does a Canon FL 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