Lens adapter compatibility

Tamron Adaptall lenses on Canon RF cameras

Can you use Tamron Adaptall lenses on Canon RF cameras? Yes, with a simple mechanical adapter (manual focus). The Tamron Adaptall flange distance is 50.70 mm and Canon RF is 20.00 mm, a difference of +30.70 mm.

+30.70 mm

Space for the adapter

50.70 mm

Tamron Adaptall flange

20.00 mm

Canon RF flange

Verdict: Yes — a simple 30.7 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.

Tamron Adaptall lenses you could adapt#

Tamron 200mm f/3.5 CT-200 BBAR

Canon RF cameras#

Other systems for Tamron Adaptall 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 Tamron Adaptall lenses autofocus on Canon RF?

No — adapted lenses are manual focus on this combination.

Does a Tamron Adaptall 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