F-number
label: عدد البؤرة @ar
label: Diafragmagetal @nl
label: Blendenzahl @de
label: F-uimhir @ga
label: F 값 @ko
label: Относительное отверстие @ru
label: Número f (óptica) @es
label: Αριθμός διαφράγματος ανοίγματος @el
label: Nombre f @ca
label: Ouverture (photographie) @fr
label: Rapporto focale @it
label: Діафрагмове число @uk
label: 焦比 @zh
label: Relativa truo de objektivo @eo
label: Clonové číslo @cs
label: Bukaan (fotografi) @in
label: F値 @ja
subject: Category:Science of photography
subject: Category:Optical quantities
subject: Category:Dimensionless numbers of physics
subject: Category:Logarithmic scales of measurement
footer: Computer simulation showing the effects of changing a camera's aperture in half-stops and from zero to infinity
alt: Changing a camera's aperture in half-stops
alt: Changing a camera's aperture from zero to infinity
image: Povray focal blur animation mode tan.gif
image: Povray focal blur animation.gif
description: razão entre a distância focal e o diâmetro da pupila de entrada @pt
description: rapport entre la distance focale de cet objectif et le diamètre de sa pupille d'entrée @fr
description: cociente de la longitud focal entre el diámetro de la pupila de entrada @es
description: অনুপাতিক পরিমাপ @bn
description: rapporto esistente tra lunghezza focale (F) di un obiettivo ed il diametro (D) del diaframma in cui entra la luce @it
description: оптическая мера светопропускания объектива @ru
description: fotoğraf makineleri ya da kameralarda diyafram açıklığı değeri @tr
description: 摄影学概念 @zh
description: verhouding van de brandpuntsafstand tot de diameter van de ingangspupil @nl
description: poměr ohniskové vzdálenosti optické soustavy a průměru vstupní čočky @cs
description: cociente da lonxitude focal entre o diámetro da pupila de entrada @gl
description: ratio of the focal length to the diameter of the entrance pupil
description: безрозмірнісна фізична величина @uk
description: mesura quantitativa @ca
description: optiese stelsel ’n aanduiding van die lensopening @af
description: rasio antara jarak fokus dan diameter pupil @in
description: Verhältnis der Brennweite zum Durchmesser der Eintrittspupille @de
wiki page external link: http://www.largeformatphotography.info/fstop.html
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Shutter_speed
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Photography
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Photojournalist
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/John_Henry_Dallmeyer
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Zeiss_Tessar
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Film_speed
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Optical_design
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Sieve_aperture
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Reciprocity_failure
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Diffusion_disc
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Bellows_factor
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Smooth_Trans_Focus
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Objective_(optics)
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Rodenstock_Imagon
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Large_Synoptic_Survey_Telescope
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Category:Logarithmic_scales_of_measurement
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Absolute_value
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Sharpness_(visual)
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Entrance_pupil
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Carl_Zeiss
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Group_f/64
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Steradian
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Integer
wiki page wiki link: https://dbpedia-live.demo.openlinksw.com/resource/Magnification