# CS-mount — Camera mount flange focal distance and adapter feasibility

For CS-mount, flange focal distance (mm) is 12.526; mount type is TV; format is 1/4", 1/3", 1/2", verified against its source on 2026-08-13.

- **Mount name:** CS-mount _(verified: appears in the quote below)_
- **Flange focal distance (mm):** 12.526 _(verified: appears in the quote below)_
- **Mount type:** TV _(verified: appears in the quote below)_
- **Format:** 1/4", 1/3", 1/2" _(verified: appears in the quote below)_

## What the source says

> CS-mount | 12.526 mm [ 3 ] [ 4 ] [ 5 ] | TV | 1/4", 1/3", 1/2" | | | | | | (surveillance cameras) |

## 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 **12.526**, as of 2026-08-13.

> CS-mount | 12.526 mm [ 3 ] [ 4 ] [ 5 ] | TV | 1/4", 1/3", 1/2" | | | | | | (surveillance cameras) |

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

briansmith.com says flange focal distance (mm) is **12.50 mm**, as of 2026-08-13.

> CS-mount | 12.50 mm | TV |

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/).