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| lens focal length; lens size | |||
| F-No. (eugeene1979) | |||
| фокусное расстояние объектива: 65 phrases in 17 subjects |
| Astronautics | 3 |
| Astronomy | 1 |
| Biology | 1 |
| Cartography | 1 |
| Cinematography | 2 |
| General | 1 |
| Makarov | 1 |
| Mass media | 23 |
| Medical | 1 |
| Nanotechnology | 3 |
| Navigation | 1 |
| Optics branch of physics | 2 |
| Patents | 4 |
| Photography | 6 |
| Polygraphy | 3 |
| Security systems | 5 |
| Technology | 7 |