Both Canon R3 and Nikon D750 have 24.0 MP resolution sensors but Canon R3's sensor is Full frame (36 x 24 mm ) and Nikon D750's sensor is Full frame (35.9 x 24 mm ).
Since Canon R3's has a larger sensor area with the same resolution, this means that it also has a larger pixel area hence better light collecting capacity for a given aperture compared to Nikon D750.
Below you can see the R3 and D750 sensor size comparison.
Canon R3 and Nikon D750 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
Both Canon R3 and Nikon D750 sensors have been tested by DxoMark. DxoMark 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. Of the two cameras that we are comparing, R3 has scored 96, 3 points higher than D750.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Canon R3 |
96 |
25.0 bits |
14.7 Evs |
4086 ISO |
Nikon D750 |
93 |
24.8 bits |
14.5 Evs |
2956 ISO |