Sony A9 has a
24.0MP Full frame (35.6 x 23.8 mm ) sized Stacked BSI-CMOS sensor and features BIONZ X processor. On the other hand, Nikon Z6 II has a
25.0MP Full frame (35.9 x 23.9 mm ) sized BSI-CMOS sensor and features Dual Expeed 6 processor.
Below you can see the A9 and Z6 Mark II sensor size comparison.
Sony A9 and Nikon Z6 II 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 A9 and Nikon Z6 II sensors have been tested by DxO and the results show that Z6 Mark II has a better overall score of 94, 2 points higher compared to A9's score of 92.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Sony A9 |
92 |
24.9 bits |
13.3 Evs |
3517 ISO |
Nikon Z6 II |
94 |
25.0 bits |
14.4 Evs |
3303 ISO |