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Meaning of f-number | Babel Free

Noun CEFR B2

Definitions

The ratio of the focal length of a lens to its diameter; a measure of the light-gathering ability of the lens.

Equivalents

Suomi aukko aukkosuhde

Bahasa Indonesia bukaan

CEFR level

B2

Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

See also

F-scale F-sharp F-sharp major F-sharp minor f-slur F-statistics