Nikon D5100 DxOMark ReviewThursday April 28 2011 Sensor Review
As we expected, in all measures the D5100 is better than the D5000. The Overall score jumps from 72 to 80. Portrait, Landscape and Sports scores are all increased. The dynamic range is improved by more than one stop, and the Sports score is improved by 1/3 stop, jumping from 868 ISO for the D5000 to 1183 for the D5100.
Tonal Range and Color Sensitivity show some improvements too, but not as remarkable as the previous ones. And here again, the difference grows as the ISO speed increases.