Lens adapter compatibility

Canon FD lenses on Pentax Q cameras

Can you use Canon FD lenses on Pentax Q cameras? Yes, with a simple mechanical adapter (manual focus). The Canon FD 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 FD 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 FD lens frames like 275 mm. A focal reducer (“speed booster”) can bring back some width and gain about a stop of light.

Canon FD lenses you could adapt#

Pentax Q cameras#

Other systems for Canon FD 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 FD lenses autofocus on Pentax Q?

No — adapted lenses are manual focus on this combination.

Does a Canon FD 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