Canon R has a
30.0MP Full frame (36 x 24 mm ) sized CMOS sensor and features DIGIC 8 processor. On the other hand, Canon 1D X III has a
20.0MP Full frame (36 x 24 mm ) sized CMOS sensor and features Digic X processor.
Canon R's sensor provides 10MP more than Canon 1D X III'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 EOS R and 1D X MIII sensor size comparison.
Canon R and Canon 1D X III 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 1D X III has 50% larger pixel area (43.29µm2 vs 28.69µm2) compared to Canon R, 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 R and Canon 1D X III sensors have been tested by DxO and the results show that 1D X MIII has a better overall score of 91, 2 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 |
Canon 1D X III |
91 |
24.2 bits |
14.5 Evs |
3248 ISO |