I used a Leica D-Lux 4 at ISO 400, the Leica M8.2 at ISO 640 (no ISO 800), and the Nikon D90 at ISO 800. Which is which? Which do you like better and why? The answer is below. Before you guess, click on each individual picture then hit the Back button to view the next. Then scroll down to the bottom for the answer.
#1 Nikon D90 ISO 800
#2 Leica D-Lux 4 ISO 400. (Even at this ISO it's noisier than the other two.)
#3 Leica M8.2 ISO 640 (There is no ISO 800, so this is as close as I could get.) Good luck with higher ISO than ISO 640. You will notice a degrading in the file, and it isn't pleasing. I wonder if Leica will fix this in the M10? I know the M9 is good to 1250, still not good enough considering the cost of the camera and how D-SLRs can shoot such low light for much cheaper a price.)