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Translations for „f-number“ in the English » Arabic Dictionary (Go to Arabic » English)

f-number PHOTO

f-number

الرقم البؤري قياس فتحة العدسة بالنسبة إلى بعدها البؤري

Monolingual examples (not verified by PONS Editors)

English

He calls the f-number the ratio number, aperture ratio number, and ratio aperture. en.wikipedia.org

For example, a camera with a 0.5 mm diameter pinhole, and a 50 mm focal length would have an f-number of 50/0.5, or 100 ("f" /100 in conventional notation). en.wikipedia.org

A smaller maximum aperture (larger minimum f-number) is slow because it delivers less light intensity and requires a slower shutter speed. en.wikipedia.org

The result is that the effective f-number of a zone plate is lower than for the corresponding pinhole and the exposure time can be decreased. en.wikipedia.org

As with other light readings, shutter speed can be changed as long as the f-number is altered to compensate, e.g. second at gives equivalent exposure to second at. en.wikipedia.org

Multiple combinations of shutter speed and f-number can give the same exposure value. en.wikipedia.org

Doubling the f-number decreases the relative brightness by a factor of four. en.wikipedia.org

In these cases the working f-number is used. en.wikipedia.org

Depth of field generally increases with decreasing aperture diameter (increasing f-number). en.wikipedia.org

A small aperture (high f-number) is often required to produce acceptable sharpness across a three-dimensional subject. en.wikipedia.org

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