Lens adapter compatibility

Sigma SA lenses on Canon RF cameras

Can you use Sigma SA lenses on Canon RF cameras? Yes, with a simple mechanical adapter (manual focus). The Sigma SA flange distance is 44.00 mm and Canon RF is 20.00 mm, a difference of +24.00 mm.

+24.00 mm

Space for the adapter

44.00 mm

Sigma SA flange

20.00 mm

Canon RF flange

Verdict: Yes — a simple 24.0 mm adapter keeps infinity focus.

What to expect#

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.

Sigma SA lenses you could adapt#

Canon RF cameras#

Other systems for Sigma SA lenses#

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

Frequently asked questions#

Will Sigma SA lenses autofocus on Canon RF?

No — adapted lenses are manual focus on this combination.

Does a Sigma SA 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