f-system
[ ef-sis-tuhm ]
nounOptics, Photography.
a system that indicates the relative aperture of a camera lens based on the f-number.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024
How to use f-system in a sentence
They work at an aperture of f/18, but I understand that they can be opened to f/16 and numbered on the f system.
The Barnet Book of Photography | Various
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