The D and the Ds have 12-bit sensors and, through the magic of some algorithms or whatnot, by the time the images are converted to a RAW file, they are considered 16-bit files. Some cameras have 14-bit sensors. What kind of improvement might one see when using a camera with a 14-bit sensor compared to one with a 12-bit sensor, all else being equal. I have heard that dynamic range is improved, i.e., more shadow detail is available and highlights don't fry as easily with more bits in the sensor. Of course, all else isn't usually equal, so what other factors play significant role in determining image quality, apart from lenses.
It's also been stated that some cameras use a "lossy" system when converting to RAW output, others a lossless system. Which type does Pentax use, and does it really matter anyway? When all
