f-number equivalent between m43 and FF

Started Mar 25, 2014 | Discussions thread
Great Bustard Forum Pro • Posts: 42,261
Re: f-number equivalent between m43 and FF

D Cox wrote:

Lights wrote:

Why aren't these questions ever asked about 135 sized sensors compared to medium format, or 135 sized sensors compared to APS-C?

Probably because few if any of us have access to medium format digital cameras. But the question of granularity in 35mm versus medium format film was very much discussed.

Actually, the question comes up a decent amount with regards to APS-C vs FF.

Yes there are differences in equivalency. A lot of it because of total light falling on the sensor.

How does a pixel know how big the sensor is ?

It doesn't. It's also not relevant, except inasmuch as the pixel count affects sensor efficiency. For example, if we had two sensors, one with 12 MP and the other with 24 MP with the same size and same QE, then if the read noise per pixel were the same for each sensor, the 24 MP sensor would be more noisy (although this would only be apparent in very low light).

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