On 5/20/2015 2:01 PM, Mike Gordon via olympus wrote:
Moose's illustration was very nice indeed and totally applicable here but not for all
situations. Some of the Sony sensors become "ISO invariant" at fairly low
ISOs" likely due to quite low apparent read noise
and enough bits in the RAW file.
I am not convinced that would correct this particular problem. The analog to
digital math is invariant.
If underexposure forces lower mid tones down into the bottom of the digital barrel, it is inevitably quantized very
crudely, with negative repercussions if it is then pulled up in post.
A. D. C. Moose
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What if the Hokey Pokey *IS* what it's all about?
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