Both Nikon D700 and Nikon D3S have Full frame sized 12.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the D700 and D3S sensor size comparison.
Nikon D700 and Nikon D3S have almost the same sensor size, so neither of them has any significant advantage over the other in terms of providing control over depth of field when used with the 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 D700 and Nikon D3S sensors have been tested by DxO and the results show that D3S has a better overall score of 82, 2 points higher compared to D700's score of 80.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Nikon D700 |
80 |
23.5 bits |
12.2 Evs |
2303 ISO |
Nikon D3S |
82 |
23.5 bits |
12.0 Evs |
3253 ISO |