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f-number

['efˌnʌmbə]
зв’яз., IT f-værdi
комп., Майкр. f-nummer (In photography, the diameter of the aperture expressed in terms of the focal length of the camera lens. The greater the f-number, the less light reaches the film and the more in focus the objects in the foreground and the background will be. For example, with an f-number = 16 the objects in the far background will be in focus. Whereas, with an f-number = 2 the background will be blurry (while foreground objects are in focus))
 Англійський тезаурус
f-number ['efˌnʌmbə]
абрев. focal number
абрев., опт. f /#
f-number
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