Both Nikon P7000 and Nikon 1 S1 have 10.0 MP resolution sensors but Nikon P7000's sensor is 1/1.7-inch (7.44 x 5.58 mm ) and Nikon 1 S1's sensor is 1-inch (13.2 x 8.8 mm ).
Since Nikon 1 S1'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 P7000.
Below you can see the P7000 and 1 S1 sensor size comparison.
Sensor Size and Resolution Comparison image of Nikon P7000 and Nikon 1 S1 Cameras
As seen above, Nikon 1 S1 has a 2.8x Larger sensor area than Nikon P7000. 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 P7000 and Nikon 1 S1 sensors have been tested by DxO and the results show that 1 S1 has a better overall score of 56, 17 points higher compared to P7000's score of 39.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Nikon P7000
39
19.1 bits
10.8 Evs
147 ISO
Nikon 1 S1
56
21.4 bits
11.1 Evs
397 ISO
Sensor size sets the circle of confusion, so it drives how much depth of field each
of these bodies gives you at a given aperture. You can calculate it exactly for the
Nikon P7000
or the
Nikon 1 S1 ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(1/1.7-inch versus 1-inch),
so compare them at the same framing rather than the same focal length.
Put the same focal length on the smaller sensor and it will show less depth of
field, not more, because it also crops tighter. The calculator shows the
full frame equivalent focal length for each body so you can match the framing.
