Canon R5 has a 45.0MP Full frame (36 x 24 mm ) sized CMOS sensor and features Digic X processor. On the other hand, Canon R3 has a 24.0MP Full frame (36 x 24 mm ) sized Stacked CMOS sensor and features Digic X processor.
Canon R5's sensor provides 21MP more than Canon R3'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 R5 and R3 sensor size comparison.
![Canon R5 vs Canon R3 Sensor Size Comparison]()
Sensor Size and Resolution Comparison image of Canon R5 and Canon R3 Cameras
Canon R5 and Canon R3 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 R3 has 86% larger pixel area (36.00µm2 vs 19.30µm2) compared to Canon R5, it has larger pixel area to collect light hence potential to 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 R5 and Canon R3 sensors have been tested by DxO and the results show that R3 has a better overall score of 96, 1 points higher compared to R5's score of 95.
| Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
|
Canon R5 |
95 |
25.3 bits |
14.6 Evs |
3042 ISO |
|
Canon R3 |
96 |
25.0 bits |
14.7 Evs |
4086 ISO |