Rule of Thumb: Difference between revisions

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(Created page with "{{photonavbar}} ===Some simple rules=== * The Sunny f/16 rule says: :: ''On a sunny day, with <kbd>ISO 100</kbd>, you expose at <kbd>1/100s</kbd> with aperture <kbd>f/16...")
 
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#REDIRECT [[Rule of thumb]]
 
===Some simple rules===
* The Sunny f/16 rule says:
:: ''On a sunny day, with <kbd>ISO 100</kbd>, you [[expose]] at <kbd>1/100s</kbd> with aperture <kbd>f/16</kbd>'' 
* The minimum [[exposure time]] for a lens with [[focal length]] '''N''' mm is 1/'''N''' s. So minimum [[exposure time]] for a 50mm lens is 1/50s
* For every doubling of the [[aperture]], you need to quadruple the [[exposure time]] for the same light condition. So if you are exposing <kbd>1/200s</kbd with <kbd>f/2.8</kbd>, you need <kbd>1/50s</kbd with <kbd>f/5.6</kbd> to get an image that is similarly bright. 
 
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Latest revision as of 08:02, 3 January 2021

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