English

Noun
wikipedia
en-noun|sg=f-number

#photography The ratio of the focal length of a lens to its diameter; a measure of the light-gathering ability of the lens

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• 2006-11-01 06:13 - Connel MacKenzie - Reverted edits by [[Special:Contributions/Guillermo D.|Guillermo D.]] ([[User_talk:Guillermo D.|Talk]]); changed back to last version by [[User:RobotGMwikt|RobotGMwikt]]

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