# Contax 645 — Camera mount flange focal distance and adapter feasibility

For Contax 645, flange focal distance (mm) is 64.00 mm; mount type is SLR; format is 6×4.5 cm; production years is 1999–, verified against its source on 2026-08-13.

- **Mount name:** Contax 645 _(verified: appears in the quote below)_
- **Flange focal distance (mm):** 64.00 mm _(verified: appears in the quote below)_
- **Mount type:** SLR _(verified: appears in the quote below)_
- **Format:** 6×4.5 cm _(verified: appears in the quote below)_
- **Production years:** 1999– _(verified: appears in the quote below)_

## What the source says

> Contax 645 | 64.00 mm | SLR | 6×4.5 cm | 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.

### Format

en.wikipedia.org says format is **6×4.5 cm**, as of 2026-08-13.

> Contax 645 | 64.00 mm | SLR | 6×4.5 cm | 1999–

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

briansmith.com says format is **6X4.5 cm**, as of 2026-08-13.

> Contax 645 | 64.00 mm | SLR | 6X4.5 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/).