Nikon D750 has a 24.0MP Full frame (35.9 x 24 mm ) sized CMOS sensor and features Expeed 4 processor. On the other hand, Nikon D810 has a 36.0MP Full frame (35.9 x 24 mm ) sized CMOS sensor and features EXPEED 4 processor.
Nikon D810'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.
One other difference between these two cameras that is worth mentioning is that Nikon D810'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 D750 and D810 sensor size comparison.
Sensor Size and Resolution Comparison image of Nikon D750 and Nikon D810 Cameras
Nikon D750 and Nikon D810 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.
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. Nikon D750 and Nikon D810 sensors have been tested by DxO and the results show that D810 has a better overall score of 97, 4 points higher compared to D750's score of 93.
| Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
|
Nikon D750 |
93 |
24.8 bits |
14.5 Evs |
2956 ISO |
|
Nikon D810 |
97 |
25.7 bits |
14.8 Evs |
2853 ISO |