I have a cropped image take from my Leica, and a NOT cropped image taken from my Nikon D80 with 50mm 1.8 lens. If you click each photo to view it larger, you can see that the cropped photo has less noise in it. Both were shot at ISO 320! Wow. That's amazing. The picture on the top was taken with the Leica. The picture on the bottom was taken with the Nikon. Both cameras have 10MP files. Both were shot at ISO 320. Both were DNG files. The only difference is the focal length of lens and the Leica shot was cropped.