# Pentacon Six — Camera mount flange focal distance and adapter feasibility

For Pentacon Six, flange focal distance (mm) is 74.1 mm; mount type is SLR; format is 6×6 cm; production years is 1956–1992, verified against its source on 2026-08-13.

- **Mount name:** Pentacon Six _(verified: appears in the quote below)_
- **Flange focal distance (mm):** 74.1 mm _(verified: appears in the quote below)_
- **Mount type:** SLR _(verified: appears in the quote below)_
- **Format:** 6×6 cm _(verified: appears in the quote below)_
- **Production years:** 1956–1992 _(verified: appears in the quote below)_

## What the source says

> Pentacon Six | 74.1 mm | SLR | 6×6 cm | 1956–1992

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

> Pentacon Six | 74.1 mm | SLR | 6×6 cm | 1956–1992

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

briansmith.com says flange focal distance (mm) is **74.10 mm**, as of 2026-08-13.

> Pentacon Six | 74.10 mm | SLR | 6X6 cm

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


### Format

en.wikipedia.org says format is **6×6 cm**, as of 2026-08-13.

> Pentacon Six | 74.1 mm | SLR | 6×6 cm | 1956–1992

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

briansmith.com says format is **6X6 cm**, as of 2026-08-13.

> Pentacon Six | 74.10 mm | SLR | 6X6 cm

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/).