# Pentax Q-mount — Camera mount flange focal distance and adapter feasibility

For Pentax Q-mount, flange focal distance (mm) is 9.2 mm; mount type is Mirrorless; format is 1/2.3" (6.17×4.55 mm) / 1/1.7"; production years is 2011–2019, verified against its source on 2026-08-13.

- **Mount name:** Pentax Q-mount _(verified: appears in the quote below)_
- **Flange focal distance (mm):** 9.2 mm _(verified: appears in the quote below)_
- **Mount type:** Mirrorless _(verified: appears in the quote below)_
- **Format:** 1/2.3" (6.17×4.55 mm) / 1/1.7" _(verified: appears in the quote below)_
- **Production years:** 2011–2019 _(verified: appears in the quote below)_

## What the source says

> Pentax Q-mount | 9.2 mm [ 2 ] | Mirrorless | 1/2.3" (6.17×4.55 mm) / 1/1.7" | 2011–2019

## Sources disagree

More than one authority states this, and they do not state the same
thing. Both are reproduced with the source each came from.

### Flange focal distance (mm)

en.wikipedia.org says flange focal distance (mm) is **9.2 mm**, as of 2026-08-13.

> Pentax Q-mount | 9.2 mm [ 2 ] | Mirrorless | 1/2.3" (6.17×4.55 mm) / 1/1.7" | 2011–2019

Source: https://en.wikipedia.org/wiki/Flange_focal_distance

briansmith.com says flange focal distance (mm) is **9.20 mm**, as of 2026-08-13.

> Pentax Q-mount | 9.20 mm | Mirrorless |

Source: https://briansmith.com/flange-focal-distance-guide/


### Format

en.wikipedia.org says format is **1/2.3" (6.17×4.55 mm) / 1/1.7"**, as of 2026-08-13.

> Pentax Q-mount | 9.2 mm [ 2 ] | Mirrorless | 1/2.3" (6.17×4.55 mm) / 1/1.7" | 2011–2019

Source: https://en.wikipedia.org/wiki/Flange_focal_distance

briansmith.com says format is **1/2.3" x 1/1.7"**, as of 2026-08-13.

> Pentax Q-mount | 9.20 mm | Mirrorless |

Source: https://briansmith.com/flange-focal-distance-guide/


## Source

- https://en.wikipedia.org/wiki/Flange_focal_distance
- https://briansmith.com/flange-focal-distance-guide/

Last verified: 2026-08-13. Review by: 2028-08-12.
Part of [Camera mount flange focal distance and adapter feasibility](https://referencesource.org/camera-lens-body-adapter-compatibility/).