Sony A7S II has a
12.0MP Full frame (35.6 x 23.8 mm ) sized CMOS sensor and features Bionz X processor. On the other hand, Nikon D4s has a
16.0MP Full frame (36 x 23.9 mm ) sized CMOS sensor and features Expeed 4 processor.
Below you can see the A7S II and D4s sensor size comparison.
Sensor Size and Resolution Comparison image of Sony A7S II and Nikon D4s Cameras
Sony A7S II and Nikon D4s 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. Sony A7S II and Nikon D4s sensors have been tested by DxO and the results show that D4s has a better overall score of 89, 4 points higher compared to A7S II's score of 85.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Sony A7S II
85
23.6 bits
13.3 Evs
2993 ISO
Nikon D4s
89
24.4 bits
13.3 Evs
3074 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
Sony A7S II
or the
Nikon D4s ,
including hyperfocal distance.
