f-number equivalent between m43 and FF

Started 7 months ago | Discussions thread
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goshigoo
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f-number equivalent between m43 and FF
7 months ago

Just read the thread about the new 15 f/1.7; I see people saying f/1.4 is f/1.4 regardless of format

I do agree with this statement on the meaning of f-number, but it is confusing since it is the format + f-number which determines the amount of light captured by a picture, which accounts for the final Signal-to-noise ratio of a picture

we should really comparing 25mm f/1.4 @ m43 vs 50mm f/2.8 @ FF
as they both yield the same View of field, DoF, Signal-to-noise ratio of the final picture and the lens size should be comparable too

Should I think this way?

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