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.
Crop factor: on a 5.5× crop Pentax Q body a 50 mm Canon RF lens frames like 275 mm. A focal reducer (“speed booster”) can bring back some width and gain about a stop of light.
Canon RF lenses you could adapt#
- Canon RF 135mm F1.8L IS USM
- Canon RF 24mm F1.4 L VCM
- Canon RF 24mm F1.8 MACRO IS STM
- Canon RF 28-70mm F2.8 IS STM
- Canon RF 50mm F1.2 L USM
- Canon RF 50mm F1.4 L VCM
- Canon RF-S 18-150mm F3.5-6.3 IS STM
- Canon RF 10-20mm f/4L IS STM
- Canon RF 100-400mm F5.6-8 IS USM
- Canon RF 100-500mm F4.5-7.1L IS USM
- Canon RF 100mm F2.8L Macro IS USM
- Canon RF 14-35mm F4 L IS USM
- Canon RF 15-30mm F4.5-6.3 IS STM
- Canon RF 15-35mm F2.8L IS USM
- Canon RF 16mm F2.8 STM
- Canon RF 200-800mm F6.3-9 IS USM
- Canon RF 24-105mm F4-7.1 IS STM
- Canon RF 24-105mm F4L IS USM
Pentax Q cameras#
- Pentax Q10 2013
- Pentax Q7 2013
- Pentax Q 2011
- Pentax Q-S1
Other systems for Canon RF lenses#
Frequently asked questions#
Will Canon RF lenses autofocus on Pentax Q?
No — adapted lenses are manual focus on this combination.
Does a Canon RF 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