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
But simultaneous selection for a higher spire and a larger aperture would be constrained in this littorinid population, at least over the short-term, because relative spire height and relative aperture area have a large negative genetic correlation.

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