Lens adapter compatibility

Canon FL lenses on Pentax Q cameras

Can you use Canon FL lenses on Pentax Q cameras? Yes, with a simple mechanical adapter (manual focus). The Canon FL flange distance is 42.00 mm and Pentax Q is 9.20 mm, a difference of +32.80 mm.

+32.80 mm

Space for the adapter

42.00 mm

Canon FL flange

9.20 mm

Pentax Q flange

Verdict: Yes — a simple 32.8 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 5.5× crop Pentax Q body a 50 mm Canon FL lens frames like 275 mm. A focal reducer (“speed booster”) can bring back some width and gain about a stop of light.

Canon FL lenses you could adapt#

Pentax Q cameras#

Other systems for Canon FL lenses#

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

Frequently asked questions#

Will Canon FL lenses autofocus on Pentax Q?

No — adapted lenses are manual focus on this combination.

Does a Canon FL to Pentax Q 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