Both Canon R8 and Canon R3 have Full frame sized 24.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the R8 and R3 sensor size comparison.
Canon R8 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.
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 R8 and Canon R3 sensors have been tested by DxO and the results show that R3 has a better overall score of 96, 3 points higher compared to R8's score of 93.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Canon R8 |
93 |
24.5 bits |
14.5 Evs |
3295 ISO |
Canon R3 |
96 |
25.0 bits |
14.7 Evs |
4086 ISO |