| |||
| aperture ratio; aperture stop | |||
| relative aperture; f-number; f-stop | |||
|
ouverture relative : 13 phrases in 9 subjects |
| Corporate governance | 1 |
| Earth sciences | 3 |
| Economics | 1 |
| General | 1 |
| Hobbies and pastimes | 1 |
| Nuclear physics | 1 |
| Radiation | 1 |
| Remote sensing | 3 |
| Technology | 1 |