Both Nikon D7000 and Nikon D4s have 16.0 MP resolution sensors but Nikon D7000's sensor is APS-C (23.6 x 15.7 mm ) and Nikon D4s's sensor is Full frame (36 x 23.9 mm ).
Since Nikon D4s's has a larger sensor area with the same resolution, this means that it also has a larger pixel area hence better light collecting capacity for a given aperture compared to Nikon D7000.
Below you can see the D7000 and D4s sensor size comparison.
As seen above, Nikon D4s has a 2.3x Larger sensor area than Nikon D7000. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in same focal length and aperture.
DxOMark Sensor Scores
DxOMark is a benchmark that scientifically assesses image quality of camera sensors. It scores camera sensors for color depth (DXO Portrait), dynamic range (DXO Landscape) and low-light sensitivity (DXO Sports), and also gives them an overall score. Nikon D7000 and Nikon D4s sensors have been tested by DxO and the results show that D4s has a better overall score of 89, 9 points higher compared to D7000's score of 80.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Nikon D7000 |
80 |
23.5 bits |
13.9 Evs |
1167 ISO |
Nikon D4s |
89 |
24.4 bits |
13.3 Evs |
3074 ISO |