Both Panasonic S1 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.
Another difference between these two cameras is that Panasonic S1's sensor lacks 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 S1 and R3 sensor size comparison.
Panasonic S1 and Canon R3 have almost the same sensor size, so neither of them has any significant advantage over the other in terms of providing control over depth of field when used with the 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. Panasonic S1 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 S1's score of 95.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Panasonic S1 |
95 |
25.2 bits |
14.5 Evs |
3333 ISO |
Canon R3 |
96 |
25.0 bits |
14.7 Evs |
4086 ISO |