Lens adapter compatibility

Olympus OM lenses on Canon RF cameras

Can you use Olympus OM lenses on Canon RF cameras? Yes, with a simple mechanical adapter (manual focus). The Olympus OM flange distance is 46.00 mm and Canon RF is 20.00 mm, a difference of +26.00 mm.

+26.00 mm
Space for the adapter
46.00 mm
Olympus OM flange
20.00 mm
Canon RF flange
Verdict: Yes — a simple 26.0 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.

Olympus OM lenses you could adapt#

Canon RF cameras#

Other systems for Olympus OM lenses#

Sony E-mountNikon ZFujifilm X-mountMicro Four ThirdsL-MountCanon EF-MFujifilm G-mountHasselblad XCDNikon 1 (CX)Pentax Q

Frequently asked questions#

Will Olympus OM lenses autofocus on Canon RF?

No — adapted lenses are manual focus on this combination.

Does a Olympus OM to Canon RF 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

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