Topical Terminology > F Numbers
1 Definition
F Numbers
For F Numbers we have a term and definition in Photography.
F Numbers (Photography) 
Numbers on the outside of the lens corresponding to the aperture opening. The larger the number (e.g., f/22 also expressed as F 22), the smaller the opening of the lens; the smaller the number (e.g., f/2.8) the larger the opening of the lens.
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