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Size-wise the DX and DR2 both have 7.4u pixels, although they use different ccds. The DMK has 5.6u pixels.
DX = Kodak KAI-0340DM
DR2 = Sony ICX424AL
DMK = Sony ICX098BL
Comparing sensitivities is tricky, as I don't know how the cameras are calibrated, ie I don't have any real way to measure the 0db gain sensitivity (I'd need a carefully controlled light box with known spectrum).
The DX and DR2 seemed very similar in my initial tests, but it later occurred to me that PGR (the manufacturer of both cameras) could easily have calibrated them at the factory to be like this. It doesn't really say anything about the actual ccd sensitivity.
However the DX has gain up to 30db and the DR2/DMK both stop at 24db. The extra 6db makes a big difference in practice. It's the difference between a dim image and a nice bright image.
The 16bit modes of the PGR cameras is also nice, and it is even more important when you are using a short shutter / high fps, as it allows the camera to more accurately digitise the lower signal level.
Bird
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