Canon R has a
30.0MP Full frame (36 x 24 mm ) sized CMOS sensor and features DIGIC 8 processor. On the other hand, Sony A7 IV has a
33.0MP Full frame (35.8 x 23.8 mm ) sized BSI-CMOS sensor and features Bionz XR processor.
One other difference between these two cameras that is worth mentioning is that Sony A7 IV'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 moiré occurring in certain scenes.
Below you can see the EOS R and A7 IV sensor size comparison.
Canon R and Sony A7 IV 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. Canon R and Sony A7 IV sensors have been tested by DxO and the results show that A7 IV has a better overall score of 97, 8 points higher compared to EOS R's score of 89.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Canon R |
89 |
24.5 bits |
13.5 Evs |
2742 ISO |
Sony A7 IV |
97 |
25.4 bits |
14.7 Evs |
3379 ISO |