Both Sony A7 II and Nikon D610 have 24.0 MP resolution sensors but Sony A7 II's sensor is Full frame (35.8 x 23.9 mm ) and Nikon D610's sensor is Full frame (35.9 x 24 mm ).
Since Nikon D610'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 Sony A7 II.
Below you can see the A7 II and D610 sensor size comparison.
Sony A7 II and Nikon D610 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 A7 II and Nikon D610 sensors have been tested by DxO and the results show that D610 has a better overall score of 94, 4 points higher compared to A7 II's score of 90.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Sony A7 II |
90 |
24.9 bits |
13.6 Evs |
2449 ISO |
Nikon D610 |
94 |
25.1 bits |
14.4 Evs |
2925 ISO |