Is there a good reference somewhere that discusses why digital camera sensors need ISO settings at all (instead of just being, say, 24-bit)?
So basically it's what we thought - eg., there is no magic "gain" problem, it's just an artifact of not having a big dac?
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(and full well at the other end)
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That's my interpretation of it. There's so much info on that page I dunno if I missed something else relevant.
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For a neat solution to the "big enough DAC" problem, see this research paper: http://web.media.mit.edu/~hangzhao/modulo.html …
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