focal length
Definitions
A measure of how strongly an optical system converges or diverges light, the inverse of optical power. In the simple case of a single convex lens, it is the distance along the optical axis from the principal plane of the lens to the lens's focal point (where, for instance, the film would be placed in a camera). For more complex or multi-element optical systems, focal length need not correspond to any obvious measurable physical distance.
Equivalents
11 more languages
Češtinaohnisková vzdálenost
Danskbrændvidde
Suomipolttoväli
Gaeilgefad fócasach
Magyarfókusztávolság
日本語焦点距離
Nederlandsbrandpuntsafstand
Polskiogniskowa
Românădistanță focală
Русскийфо́кусное расстоя́ние
CEFR level
B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
This word is part of the CEFR B2 vocabulary — upper intermediate level.
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