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Focal ratio   /fˈoʊkəl rˈeɪʃiˌoʊ/   Listen
Focal ratio

noun
1.
The ratio of the focal length to the diameter of a (camera) lens system.  Synonyms: f number, speed, stop number.






WordNet 3.0 © 2010 Princeton University








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Words linked to "Focal ratio" :   ratio



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