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.
rdfs:label
"f-number"@en
skos:altLabel
"f-ratio"@en
"focal ratio"@en
"ƒ-number"@en
schema:description
"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."@en
schema:dateModified "2026-08-17T06:38:26+00:00"^^xsd:dateTime
schema:version 2532220338
wikibase:claim p:P6790
wikibase:directClaim wdt:P6790
wikibase:directClaimNormalized p:direct-normalized/P6790
wikibase:novalue p:novalue/P6790
wikibase:propertyType wikibase:Quantity
wikibase:qualifier p:qualifier/P6790
wikibase:qualifierValue p:qualifier/value/P6790
wikibase:qualifierValueNormalized p:qualifier/value-normalized/P6790
wikibase:reference p:reference/P6790
wikibase:referenceValue p:reference/value/P6790
wikibase:referenceValueNormalized p:reference/value-normalized/P6790
wikibase:statementProperty p:statement/P6790
wikibase:statementValue p:statement/value/P6790
wikibase:statementValueNormalized p:statement/value-normalized/P6790
wikibase:statements 14
p:P1629 wd:statement/P6790-5853EBC3-AA60-4827-A229-1A8A28BF08BE
p:P1659 wd:statement/P6790-7c094409-4942-dffb-1026-68fccfa8d436
wd:statement/P6790-C2A2F45B-FE09-4E9B-A7E4-D679FA2020B7
wd:statement/P6790-a60d1663-4c60-de4e-2a04-6d5e2fcc6fc9
p:P1855 wd:statement/P6790-54B24A6B-78A8-484E-B023-90F38A6C650F
wd:statement/P6790-5a50f282-4c5a-6484-1de9-c76a8b39a1b3
p:P2302 wd:statement/P6790-23E84CF0-6F94-4EA4-AF4C-CAD2A8A448CD
wd:statement/P6790-54552D0A-93C5-4932-8825-67C33CDA2FC7
wd:statement/P6790-54F387A8-8E27-4F69-947D-3545A90483D4
wd:statement/P6790-C015770F-ACEC-40DA-A90E-94C38B358C92
p:P31 wd:statement/P6790-1C6EC082-1D2B-4B01-BB67-708D21C497D5
p:P3254 wd:statement/P6790-9EBEC73B-C643-46A0-8556-F22881DA85CB
p:P6685 wd:statement/P6790-70A5FD29-8798-4620-BF21-E313D666717A
wd:statement/P6790-A0CFCD78-78D4-476E-BC4A-8A385182D31D
wdt:P1629 f-number
wdt:P1659 exposure time
ISO speed
aperture
wdt:P1855 Afghan Girl
Dülmen, North Rhine-Westphalia, Germany
wdt:P2302 subject type constraint
range constraint
allowed units constraint
wdt:P31 Wikidata property related to photography
wdt:P3254 <https://www.wikidata.org/wiki/Wikidata:Property_proposal/f-number>
wdt:P6685 <http://commons.wikimedia.org/wiki/Special:FilePath/Kew%20fountain%20%28long%20exposure%29.jpg>
<http://commons.wikimedia.org/wiki/Special:FilePath/Kew%20fountain%20%28short%20exposure%29.jpg>
Download as:
TurtleJSON-LDRDF/XML
data from SPARQL profile: Wikidata