Sony A7R has a
36.0MP Full frame (35.9 x 24 mm ) sized CMOS sensor and features Bionz X processor. On the other hand, Nikon D750 has a
24.0MP Full frame (35.9 x 24 mm ) sized CMOS sensor and features Expeed 4 processor.
Sony A7R's sensor provides 12MP more than Nikon D750's sensor, which gives a significant advantage in real life. You can print your images larger or crop more freely.
On the other hand, please keep in mind that Max sensor resolution is not the only determinant of resolving power. Factors such as the optical elements, low pass filter, pixel size and sensor technology also affects the final resolution of the captured image.
Another difference between these two cameras is that Sony A7R's sensor lacks 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 A7R and D750 sensor size comparison.
Sony A7R and Nikon D750 have the same sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture. On the other hand, since Nikon D750 has 49% larger pixel area (35.66µm2 vs 23.83µm2) compared to Sony A7R, it has larger pixel area to collect light hence potential to have less noise in low light / High ISO images.
DxOMark Sensor Scores
Both Sony A7R and Nikon D750 sensors have been tested by DxoMark. DxoMark 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. Of the two cameras that we are comparing, A7R has scored 95, 2 points higher than D750.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Sony A7R |
95 |
25.6 bits |
14.1 Evs |
2746 ISO |
Nikon D750 |
93 |
24.8 bits |
14.5 Evs |
2956 ISO |