f-number

ratio of the system's focal length to the diameter of the entrance pupil. Sample: 4 (generally written "ƒ/4") for a lens with 200 mm focal length using an entrance pupil diameter of 50 mm.

f-number is …
instance of (P31):
Wikidata property related to photographyQ27151329

External links are
P3254property proposal discussionhttps://www.wikidata.org/wiki/Wikidata:Property_proposal/f-number

P2302property constraintsubject type constraintQ21503250
range constraintQ21510860
allowed units constraintQ21514353
P1659related propertyexposure timeP6757
ISO speedP6789
apertureP7863
P1629Wikidata item of this propertyf-numberQ862169

Wikimedia Commons Images

P6685: Wikidata property example for media


FileName: Kew fountain (long exposure).jpg

Description: This is a photo of listed building number 1262672.

Artist: Stephen B Streater

Work is copyrighted.
License: CC BY-SA 3.0
Attribution is required.

P6685: Wikidata property example for media


FileName: Kew fountain (short exposure).jpg

Description: Fountain at Kew Gardens, England, with a 1/320s exposure time

Artist: Stephen B Streater

Work is copyrighted.
License: CC BY-SA 3.0
Attribution is required.

Reverse relations

related property (P1659)
P6789ISO speed
P7863aperture
P6757exposure time

Q862169f-numberWikidata propertyP1687

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