# M39×1/28.8 mount — Camera mount flange focal distance and adapter feasibility

For M39×1/28.8 mount, flange focal distance (mm) is 28.80 mm; mount type is Mirrorless; format is 24×36 mm; production years is 1948-1978, verified against its source on 2026-08-13.

- **Mount name:** M39×1/28.8 mount _(verified: appears in the quote below)_
- **Flange focal distance (mm):** 28.80 mm _(verified: appears in the quote below)_
- **Mount type:** Mirrorless _(verified: appears in the quote below)_
- **Format:** 24×36 mm _(verified: appears in the quote below)_
- **Production years:** 1948-1978 _(verified: appears in the quote below)_

## What the source says

> M39×1/28.8 mount | 28.80 mm [ 12 ] | Mirrorless | 24×36 mm | 1948-1978

## Source

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

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/).