Both Canon G16 and Sony A7S II have 12.0 MP resolution sensors but Canon G16's sensor is 1/1.7-inch (7.44 x 5.58 mm ) and Sony A7S II's sensor is Full frame (35.6 x 23.8 mm ).
Since Sony A7S II'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 Canon G16.
Below you can see the G16 and A7S II sensor size comparison.
Sensor Size and Resolution Comparison image of Canon G16 and Sony A7S II Cameras
As seen above, Sony A7S II has a 20.4x Larger sensor area than Canon G16. 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. Canon G16 and Sony A7S II sensors have been tested by DxO and the results show that A7S II has a better overall score of 85, 31 points higher compared to G16's score of 54.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Canon G16 |
54 |
21.0 bits |
11.7 Evs |
230 ISO |
Sony A7S II |
85 |
23.6 bits |
13.3 Evs |
2993 ISO |