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f-number ['efˌnʌmbə]
astr.	dénominateur d'ouverture
comp., MS	f : chiffre (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))
tech.	ouverture relative
F number
rem.sens.	nombre F; ouverture relative minimale
f number
med.	ouverture numérique
English thesaurus
f-number ['efˌnʌmbə]
abbr.	focal number
abbr., opt.	f /#

f-number: 3 phrases in 3 subjects

Chemistry	1
General	1
Transport	1