Originally posted by rawr Very true. Once you run a clearly 'DR impaired' RAW image (like an ISO 12800 image of a dark scene) through a few different RAW processors with their default settings, surprising differences in stuff like clarity and vibrance can emerge, as well as of course differences in noise rendering.
The limits of dynamic range, or essentially the lowest light level that registers with some usable signal is limited by noise. At one point there isn't any signal or indication of light levels, simply noise from the various processes that create a number when reading the sensor.
So a very good noise algorithm can widen the range by taking the valid signals and filling in the holes. There are also techniques on recovering over exposed sections. Both have limits; there has to be something to work with, but on some images can get something out that didn't seem to be there.
If I need a stop of light performance the first place to start is improving noise processing. I don't do this, but a friend will layer out the various parts of the image and apply more or less aggressive noise algorithms to the different parts. If I want a stop of light in lenses I need to fork out 4-5 digit sums.
The K5 sensor was famous for producing raw images that could be pushed to extremes, as does the 645Z. The K3 has less ability, but higher resolution giving more signal to the algorithm to play with. We will see what the K1 does.
The K1 pixel shift has the potential to be outstanding, but requires support from software to reach it's potential.