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f-stop

f-stop

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f-stop   (ěf'stŏp')

n.  

  1. Abbr. f/ A camera lens aperture setting that corresponds to an f-number.

  2. See f-number.


[f(ocal length) + stop.]
f-num·ber   (ěf'nŭm'bər)
n.   The ratio of the focal length of a lens or lens system to the effective diameter of its aperture. Also called f-stop.

[f(ocal length) + number.]
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The American Heritage® Dictionary of the English Language, Fourth Edition
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