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f-number [am. angl. ˈɛf ˌnəmbər, brit. angl.] SAM.

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f-number

número m. spol f

ameriška angleščina

Enojezični primeri (nepregledani od uredništva PONS)

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

For distant subjects (beyond macro range), depth of focus is relatively insensitive to focal length and subject distance, for a fixed f-number. 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

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

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

A wider aperture, identified by a smaller f-number, allows using a faster shutter speed for the same exposure. 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 lower f-number denotes a greater aperture opening which allows more light to reach the film or image sensor. en.wikipedia.org

Ignoring the f-number markings, the f-stops make a logarithmic scale of exposure intensity. en.wikipedia.org

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