Im a student of cinematography and i need to know how to calculate the diaphragm with the Ev. I know that in 1/24 seg, and EV=12 the diaphragm is f=8, but i dont understand why in my exposimeter, when i have a EV= 12.8 the diaphragm its f=11 1/3... Thanks for your responses.
Exposure value equivalences in cinematography
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