English ⇄ Arabic Bulgarian Chinese Chinese Taiwan Chinese simplified Croatian Czech Danish Dutch English Estonian Finnish French German Greek Hebrew Hindi Hungarian Italian Japanese Korean Latvian Lithuanian Norwegian Bokmål Polish Portuguese Romanian Russian Serbian Latin Slovak Slovene Spanish Swedish Thai Turkish Ukrainian

f-number ['efˌnʌmbə]
comp., MS	f numurs (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))
English thesaurus
f-number ['efˌnʌmbə]
abbr.	focal number
abbr., opt.	f /#