Dynamic Range (Bill Claff): d3s-d4-d800e-5d3

Started Mar 15, 2012 | Discussions thread
perhort
perhort Regular Member • Posts: 133
Re: That's not "more realistic"

It's just that this would make the D800 behave differently from all other Exmor sensors known to mankind. So perhaps the behavior could be due to sample quirks or that the Expeed 3 has been used to cook the files.

Marianne Oelund wrote:

perhort wrote:

However,instead of falling linearly, the curve becomes curiously convex between iso 800-3200, and this is what accounts for the exceptional high iso performance of the sensor. If one more realistically assumes that it will fall linearly through the range in true Exmor fashion, the D800 will end up in the territory of the 5D mkIII at higher isos, and thus slightly behind the D4.

You have not been paying attention. Data available from the D800 shows clearly that some optimization has been done in the ISO range just below 1600, which means the "curiously convex" curve is actually accurate, whereas assuming a linear rolloff of DR isn't.

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