Both Nikon D750 and Canon M3 have 24.0 MP resolution sensors but Nikon D750's sensor is Full frame (35.9 x 24 mm ) and Canon M3's sensor is APS-C (22.3 x 14.9 mm ).
Since Nikon D750'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 Canon M3.
Below you can see the D750 and M3 sensor size comparison.
As seen above, Nikon D750 has a 2.6x Larger sensor area than Canon M3. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in same focal length and aperture.
DxOMark Sensor Scores
Both Nikon D750 and Canon M3 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, D750 has scored 93, 21 points higher than M3.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Nikon D750 |
93 |
24.8 bits |
14.5 Evs |
2956 ISO |
Canon M3 |
72 |
22.8 bits |
11.8 Evs |
1169 ISO |