Term - F/number |
| F/number | SWPP Photographic Glossary | Wednesday 9th July 2025 |
|
F/numberThe lens focal length divided by effective diameter of the aperture gives the f/number that's used to indicate the aperture value. Each full f/number halves or doubles image brightness and some lenses can also be controlled in half or third stop steps.
|
|
Information provided by: SWPP |
