How to Memorize the F-Stop Scale With Simple Math
Off the top of your head, do you know how much more light f/2.8 lets in compared to f/5.6? Do you know the f-stop number that comes after 11? This 1.5-minute video reveals the simple pattern used by the scale.
All you have to remember are the numbers 1 and 1.4. From there, you can build out the scale by doubling (and rounding):
1, 2, 3, 4, 8, 16, 32, 64
1.4, 2.8, 5.6, 11.2 (11), 22.4 (22), 44.8 (45)
It’s that simple! Check out the video at the top if it’s still not clear.
(via Hey Indie Filmmakers via ISO 1200)
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