What does f-number mean?

Word Pronunciation & Dictionary

f-number

Word Rarity Uncommon

Frequency: Zipf frequency 4.97 in modern English

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noun

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

f-numbers (plural)

f-stop

f-stop

f-value

What does f-number mean?: The ratio of the focal length of a lens to its diameter; a measure of the light-gathering ability of the lens.

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