Canon 4000D has a 18.0MP APS-C (22.3 x 14.9 mm ) sized CMOS sensor and features Digic 4+ processor. On the other hand, Nikon D850 has a 46.0MP Full frame (35.9 x 23.9 mm ) sized BSI-CMOS sensor and features Expeed 5 processor.
Nikon D850's sensor provides 28MP more than Canon 4000D'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 D850'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 moire occurring in certain scenes.
Below you can see the 4000D and D850 sensor size comparison.
![Canon 4000D vs Nikon D850 Sensor Size Comparison]()
Sensor Size and Resolution Comparison image of Canon 4000D and Nikon D850 Cameras
As seen above, Nikon D850 has a 2.6x Larger sensor area than Canon 4000D. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in 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. Canon 4000D and Nikon D850 sensors have been tested by DxO and the results show that D850 has a better overall score of 100, 37 points higher compared to 4000D's score of 63.
| Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
|
Canon 4000D |
63 |
21.9 bits |
11.4 Evs |
695 ISO |
|
Nikon D850 |
100 |
26.4 bits |
14.8 Evs |
2660 ISO |