f-number СЪЩ
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едноезични примери (не са проверени от PONS редакцията)
The f-number of the human eye varies from about 8.3 in a very brightly lit place to about 2.1 in the dark.
en.wikipedia.org The f-number of the microlens is determined ultimately by the width of the pixel and its height above the silicon, which determines its focal length.
en.wikipedia.org A small aperture (high f-number) is often required to produce acceptable sharpness across a three-dimensional subject.
en.wikipedia.org Each stop is marked with its corresponding f-number, and represents a halving of the light intensity from the previous stop.
en.wikipedia.org The two equalities in the equation above are each taken by various authors as the definition of working f-number, as the cited sources illustrate.
en.wikipedia.org