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
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
References in periodicals archive ?
Raman scattering spectra of TlGa[Se.sub.2] crystals were measured on double high-aperture spectrometers DFS-32 with linear dispersion of 5 [Angstrom]/mm and relative aperture of 1:5 and resonance Raman scattering spectra on spectrometer SDL-1 with dispersion of 7 [Angstrom]/mm and relative aperture of 1:2.
The MEMS camera is without backside illumination (BSI) sensor, f/2.4 relative aperture and the sensor size is 1/3.2.

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