# Canon R (FL, FD, FDn) — Camera mount flange focal distance and adapter feasibility

For Canon R (FL, FD, FDn), flange focal distance (mm) is 42; mount type is SLR 35mm camera, verified against its source on 2026-08-13.

- **Mount name:** Canon R (FL, FD, FDn) _(verified: appears in the quote below)_
- **Flange focal distance (mm):** 42 _(verified: appears in the quote below)_
- **Mount type:** SLR 35mm camera _(verified: appears in the quote below)_

## What the source says

> Canon R (FL, FD, FDn) | 42 | SLR 35mm camera

## Source

- https://allphotolenses.com/articles/item/c_6.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/).