Meaning Of The Word Relative aperture

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Relative aperture Meaning

Relative aperture Definition
Relative aperture Definition

What's The Definition Of Relative aperture?

relative aperture in American English
noun: the ratio of the diameter of a lens, esp. a camera lens, to the focal length; the reciprocal of the f number or focal ratio of the lens

relative aperture in British English
noun: the ratio of the equivalent focal length of a lens to the effective aperture of the lens; written as f/n, f:n, or fn, where n is the numerical value of this ratio and is equivalent to the f-number

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