f number
bər noun Optics, Photography.
a number corresponding to the ratio of the focal length to the diameter of a lens system, especially a camera lens. In f /1.4, 1.4 is the f-number and signifies that the focal length of the lens is 1.4 times as great as the diameter. Abbreviation: f /, f/, f, f:
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Link To f number
Collins
World English Dictionary
| f-number or f number | |
| —n | |
| photog See also T-number the numerical value of the relative aperture. If the relative aperture is f8, 8 is the f-number and indicates that the focal length of the lens is 8 times the size of the lens aperture | |
| f number or f number | |
| —n | |
00:10
F number
is always a great word to know.
So is doohickey. Does it mean:
| a fool or simpleton; ninny. |
| a gadget; dingus; thingumbob. |
| f-number or f number | |
| —n | |
| photog See also T-number the numerical value of the relative aperture. If the relative aperture is f8, 8 is the f-number and indicates that the focal length of the lens is 8 times the size of the lens aperture | |
| f number or f number | |
| —n | |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
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