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aperture
aperture
antenn.
فتحة
|
illumination
illumination
light.
إضاءة
;
إنارة
to phrases
aperture
['æpəʧə]
n
med.
فُتْحَة
aperture
of an antenna
n
antenn.
فتحة
لهوائى
English thesaurus
aperture
['æpəʧə]
abbr.
abbr., oil
ap
؛
aper
cinema
A measure of the width of the opening allowing light to enter a camera. The apparent diameter of a lens viewed from the position of the object against a diffusely illuminated background is called the "effect aperture". The ratio of focal length of a lens to its "effective aperture" for an object located at infinity is called the "relative aperture", or "f/number". Larger apertures allow more light to enter a camera, hence darker scenes can be recorded. Conversely, smaller apertures allow less light to enter, but have the advantage of creating a large depth of field. See also shutter speed.
aperture:
56 phrases
in 12 subjects
Agriculture
4
Antennas and waveguides
9
Economy
1
Fishery
fishing industry
2
Forestry
2
Lighting
other than cinema
2
Medical
23
Radio
3
Remote sensing
6
Telegraphy
2
Thermal Energy
1
Video recording
1
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