DxOMark is one of the trusted name to compare the quality of the sensor in a camera. DxOMark ratings issued for the quality of a camera sensor is always awaited. If DP Review assessing the overall quality of a camera (price, reliability, speed, etc.), the more the quantity DxOMark by testing the characteristics of sensors in the laboratory (DxOMark is the product of DxO lab).
Here is the rating for Nikon DSLR cameras from DxOMark until January 2013. Ranking judged overall score. But it is important also to look at the score for each category: for portrait photos are scores of colors, for landscape is dynamic range while scores for sports performance at high ISO is, the higher the score the better the quality of the sensor. Please:
Ranked First, Nikon D800E
Overall Score: 96
Score portrait (color bit depth): 25.8
Score landscape (dynamic range): 14.3
Score sports (ISO low lights): 2979
Ranked second, the Nikon D800
Overall Score: 95
Score portrait (color bit depth): 25.3
Score landscape (dynamic range): 14.4
Score sports (ISO low lights): 2853
Ranked Third, Nikon D600
Overall Score: 94
Score portrait (color bit depth): 25.1
Score landscape (dynamic range): 14.2
Score sports (ISO low lights): 2980
Ranked Fourth, the Nikon D4
Overall Score: 89
Score portrait (color bit depth): 24.7
Score landscape (dynamic range): 13.1
Score sports (ISO low lights): 2955
Ranked Fifth, Nikon D3X
Overall Score: 88
Score portrait (color bit depth): 24.7
Score landscape (dynamic range): 13.7
Score sports (ISO low lights): 1992
Ranked Sixth, the Nikon D5200
Overall Score: 84
Score portrait (color bit depth): 24.2
Score landscape (dynamic range): 13.9
Score sports (ISO low lights): 1284
Ranked Seventh, the Nikon D3S
Overall Score: 82
Score portrait (color bit depth): 23.5
Score landscape (dynamic range): 12
Score sports (ISO low lights): 3253
To the rank-8, Nikon D3200
Overall Score: 81
Score portrait (color bit depth): 24.1
Score landscape (dynamic range): 13.2
Score sports (ISO low lights): 1131
To the rank-9, Nikon D3
Overall Score: 81
Score portrait (color bit depth): 23.5
Score landscape (dynamic range): 12.2
Score sports (ISO low lights): 2290
Ranked Top-10, Nikon D700
Overall Score: 80
Score portrait (color bit depth): 23.5
Score landscape (dynamic range): 12.2
Score sports (ISO low lights): 2303
Ranked Top-11, Nikon D7000
Overall Score: 80
Score portrait (color bit depth): 23.5
Score landscape (dynamic range): 13.9
Score sports (ISO low lights): 1167
Ranked First, Nikon D800E
Overall Score: 96
Score portrait (color bit depth): 25.8
Score landscape (dynamic range): 14.3
Score sports (ISO low lights): 2979
Ranked second, the Nikon D800
Overall Score: 95
Score portrait (color bit depth): 25.3
Score landscape (dynamic range): 14.4
Score sports (ISO low lights): 2853
Ranked Third, Nikon D600
Overall Score: 94
Score portrait (color bit depth): 25.1
Score landscape (dynamic range): 14.2
Score sports (ISO low lights): 2980
Ranked Fourth, the Nikon D4
Overall Score: 89
Score portrait (color bit depth): 24.7
Score landscape (dynamic range): 13.1
Score sports (ISO low lights): 2955
Ranked Fifth, Nikon D3X
Overall Score: 88
Score portrait (color bit depth): 24.7
Score landscape (dynamic range): 13.7
Score sports (ISO low lights): 1992
Ranked Sixth, the Nikon D5200
Overall Score: 84
Score portrait (color bit depth): 24.2
Score landscape (dynamic range): 13.9
Score sports (ISO low lights): 1284
Ranked Seventh, the Nikon D3S
Overall Score: 82
Score portrait (color bit depth): 23.5
Score landscape (dynamic range): 12
Score sports (ISO low lights): 3253
To the rank-8, Nikon D3200
Overall Score: 81
Score portrait (color bit depth): 24.1
Score landscape (dynamic range): 13.2
Score sports (ISO low lights): 1131
To the rank-9, Nikon D3
Overall Score: 81
Score portrait (color bit depth): 23.5
Score landscape (dynamic range): 12.2
Score sports (ISO low lights): 2290
Ranked Top-10, Nikon D700
Overall Score: 80
Score portrait (color bit depth): 23.5
Score landscape (dynamic range): 12.2
Score sports (ISO low lights): 2303
Ranked Top-11, Nikon D7000
Overall Score: 80
Score portrait (color bit depth): 23.5
Score landscape (dynamic range): 13.9
Score sports (ISO low lights): 1167