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aperature number vs f number

Started 10 months ago | Questions thread
guinness2
guinness2 Veteran Member • Posts: 4,617
Re: aperature number vs f number

Toronto Photography wrote:

i suspect that the apertue number would have made more sense if it was standard as the bigger the number seems to have more light as oppose to the denomintor of a fraction. And I suspect someone uses it just like some people use Kelvin and people used to use and maybe in the USA still use the Rankine scale.

Trivia question did white balance use the Rankine scale first then switch?

If you mean by “denominator of a fraction” the f/ stop consider this practical meaning of it:

One exposure value step ( twice more of the exposure) means for example to shift SS from 250 to 125, ISO from 100 to 200 or f-stop from f/5.6 to f/4. All the same exposure gain, 1 EV.

Do you see any aperture number on lens scale? No , because f/stop is more practical , see above.
But I appreciate curious questions anytime.

IMHO , using Celsius or Kelvin is just a tradition.

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