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Home > Technology > What does the 'f' letter stand for in photography?, e.g f5, f2.2 etc

What does the 'f' letter stand for in photography?, e.g f5, f2.2 etc

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snotneck | 11:00 Tue 09th Sep 2008 | Technology
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I know the figures stand for the size of the aperture, but what's the letter for?
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Avatar Image Prescott
Focal length
11:00 Tue 09th Sep 2008
Avatar Image kempie
It is actually a focal stop i.e. the ratio between focal length and apparent aperture.

A Tedious Explanation of the f/stop
12:05 Tue 09th Sep 2008

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What does the 'f' letter stand for in photography?, e.g f5, f2.2 etc

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