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, Canon T6i has a 24.0MP APS-C (22.3 x 14.9 mm ) sized CMOS sensor and features DIGIC 6 processor.
Canon T6i's sensor provides 6MP 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.
Below you can see the 4000D and T6i sensor size comparison.
Sensor Size and Resolution Comparison image of Canon 4000D and Canon T6i Cameras
Canon 4000D and Canon T6i 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 Canon 4000D has 33% larger pixel area compared to Canon T6i, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.
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 Canon T6i sensors have been tested by DxO and the results show that T6i has a better overall score of 71, 8 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 |
|
Canon T6i |
71 |
22.7 bits |
12.0 Evs |
919 ISO |