G6 vs newest sensors: Real difference in high ISO noize

Started Mar 5, 2014 | Questions thread
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Re: G6 vs newest sensors: Real difference in high ISO noize
In reply to Electriq, Mar 5, 2014

Electriq wrote:

I think this kind of plot is useful (if real ISO is measured correctly). Because if you compare two cameras in real conditions, on the same conditions with the same scene lightness, lens f setting and exposure G6 will set ISO 6400 and E-M5 ISO 12800 which corresponds to real 6400.

That is incorrect. If the G6 sets ISO 6400, the E-M5 will also set ISO 6400 (or something very close to it, assuming all else remains equal).

Or alternatively, if we set ISO 6400 on both cameras, the exposure on E-M5 will be 2 times longer.

That is also incorrect. If we set ISO 6400 on both cameras, the exposures will be roughly equal on both cameras, again, aotbe.

The E-M5 will, in both cases, simply 'underexpose' by almost a full stop from what its sensor would allow, then it will 'brighten' the result (if you're shooting JPEG) or tell your raw editor (some, not all raw editors) how much to 'brighten' the RAW file, per default, when you open it, to make up for the difference.

So we have to compare noise and dynamic range of G6 ISO 6400 and E-M5 ISO 12800 to obtain real-life results.

That is also incorrect.

See this helpful, informative article on Exposure vs. Brightening  for more info...

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