Library / English Dictionary

    STOP NUMBER

    Pronunciation (US): Play  (GB): Play

     I. (noun) 

    Sense 1

    Meaning:

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

    Synonyms:

    f number; focal ratio; speed; stop number

    Classified under:

    Nouns denoting relations between people or things or ideas

    Hypernyms ("stop number" is a kind of...):

    ratio (the relative magnitudes of two quantities (usually expressed as a quotient))

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