# 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-numberWant to thank TFD for its existence? Tell a friend about us, add a link to this page, or visit the webmaster's page for free fun content.

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