Sony A1 has a
50.0MP Full frame (35.9 x 24 mm ) sized Stacked CMOS sensor and features Dual Bionz XR processor. On the other hand, Nikon Z7 has a
46.0MP Full frame (35.9 x 23.9 mm ) sized BSI-CMOS sensor and features Expeed 6 processor.
One other difference between these two cameras that is worth mentioning is that Nikon Z7's sensor doesn't have an anti-alias (Low-Pass) filter. Removing anti-alias filter increases the sharpness and level of detail but at the same time, it increases the chance of moiré occurring in certain scenes.
Below you can see the A1 and Z7 sensor size comparison.
Sony A1 and Nikon Z7 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 A1 and Nikon Z7 sensors have been tested by DxO and the results show that Z7 has a better overall score of 99, 1 points higher compared to A1's score of 98.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Sony A1 |
98 |
25.9 bits |
14.5 Evs |
3163 ISO |
Nikon Z7 |
99 |
26.3 bits |
14.6 Evs |
2668 ISO |