F number Uncommon

Definitions

Noun

the ratio of the focal length to the diameter of a (camera) lens system

focal ratio f number stop number speed

See Also

lens focal length diameter ratio exposure f stop measure light

Related Terms

lens focal length diameter ratio exposure f stop measure light gathering

Broader Terms (hypernyms)

ratio

Rhyming Words

ber aber ober eber uber juber heber tuber suber rober ember umber tober cyber jiber sober mlber fiber giber ruber

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