relative aperture


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relative aperture

n
(Photography) photog 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
References in periodicals archive ?
the aperture of the fiber and the relative aperture
Designed to achieve an excellent compromise between the demands for high sensitivity (the lens' maximum relative aperture is f 1.
The YJ13x6B series represents a new level of achievement in balancing good sensitivity (this lens' maximum relative aperture is f 2.

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