> I note the point about tone gradation in the samples posted on Pentax
> Japan's web site. But without comparative samples of the same subject
> taken with, say, a 12 bit A/D converter, I can't tell yet just what the
> 22 bit converter will give us.
>
One possibility that would enhance tonality in the shadows
(somewhat at the expense of the highlights) would be that the 12-bits they
include in the RAW file are nonlinear. Currently, all the RAW files are
the linear output from the sensors. Converting these 12-bits to
gamma-corrected would more evenly distribute the tonality among the
highlights, mids, and shadows. Oh, and since 8-bits gamma-correct is
"enough" so long as things aren't post-processed, having 12-bits of gamma
corrected gives 16x as much latitude.
Hey... it's a possibility.
-Cory
*************************************************************************
* Cory Papenfuss, Ph.D., PPSEL-IA *
* Electrical Engineering *
* Virginia Polytechnic Institute and State University *
*************************************************************************
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