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F/numberSWPP Photographic Glossary

Saturday 12th June 2021  




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F/number

The lens focal length divided by effective diameter of the aperture gives the f/number that's used to indicate the aperture value. Each full f/number halves or doubles image brightness and some lenses can also be controlled in half or third stop steps.



 

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06/11/2019 11:36:03