Both Samsung EX2F and Nikon P7800 have 1/1.7-inch sized 12.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the EX2F and P7800 sensor size comparison.
Sensor Size and Resolution Comparison image of Samsung EX2F and Nikon P7800 Cameras
Samsung EX2F and Nikon P7800 have the same sensor sizes so they will provide same level of control over the depth of field when used with 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. Samsung EX2F and Nikon P7800 sensors have been tested by DxO and the results show that P7800 has a better overall score of 54, 6 points higher compared to EX2F's score of 48.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Samsung EX2F
48
20.0 bits
11.5 Evs
209 ISO
Nikon P7800
54
21.2 bits
11.7 Evs
200 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
Samsung EX2F
or the
Nikon P7800 ,
including hyperfocal distance.