Both Sony A6400 and Leica M10 have 24.0 MP resolution sensors but Sony A6400's sensor is APS-C (23.5 x 15.6 mm ) and Leica M10's sensor is Full frame (35.8 x 23.9 mm ).
Since Leica M10'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 Sony A6400.
Below you can see the A6400 and M10 sensor size comparison.
As seen above, Leica M10 has a 2.3x Larger sensor area than Sony A6400. 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
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. Sony A6400 and Leica M10 sensors have been tested by DxO and the results show that M10 has a better overall score of 86, 3 points higher compared to A6400's score of 83.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Sony A6400 |
83 |
24.0 bits |
13.6 Evs |
1431 ISO |
Leica M10 |
86 |
24.4 bits |
13.3 Evs |
2133 ISO |