# Pentax 6×7 — Camera mount flange focal distance and adapter feasibility

For Pentax 6×7, flange focal distance (mm) is 84.95 mm; mount type is SLR; format is 6×7 cm; production years is 1969–1999, verified against its source on 2026-08-13.

- **Mount name:** Pentax 6×7 _(verified: appears in the quote below)_
- **Flange focal distance (mm):** 84.95 mm _(verified: appears in the quote below)_
- **Mount type:** SLR _(verified: appears in the quote below)_
- **Format:** 6×7 cm _(verified: appears in the quote below)_
- **Production years:** 1969–1999 _(verified: appears in the quote below)_
- **Throat diameter (mm):** 72 _(per graphics.cornell.edu, not stated by the source above)_

## What the source says

> Pentax 6×7 | 84.95 mm [ 22 ] or 85.00 mm | SLR | 6×7 cm | 1969–1999

## 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 **84.95 mm**, as of 2026-08-13.

> Pentax 6×7 | 84.95 mm [ 22 ] or 85.00 mm | SLR | 6×7 cm | 1969–1999

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

graphics.cornell.edu says flange focal distance (mm) is **84.95**, as of 2026-08-13.

> Pentax 6×7 | bayonet | 84.95 | 72 |

Source: https://www.graphics.cornell.edu/~westin/misc/mounts-by-register.html


### Mount type

en.wikipedia.org says mount type is **SLR**, as of 2026-08-13.

> Pentax 6×7 | 84.95 mm [ 22 ] or 85.00 mm | SLR | 6×7 cm | 1969–1999

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

graphics.cornell.edu says mount type is **bayonet**, as of 2026-08-13.

> Pentax 6×7 | bayonet | 84.95 | 72 |

Source: https://www.graphics.cornell.edu/~westin/misc/mounts-by-register.html


## Source

- https://en.wikipedia.org/wiki/Flange_focal_distance
- https://www.graphics.cornell.edu/~westin/misc/mounts-by-register.html

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/).