Both Leica M10 and Sony A6400 have 24.0 MP resolution sensors but Leica M10's sensor is Full frame (35.8 x 23.9 mm ) and Sony A6400's sensor is APS-C (23.5 x 15.6 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 M10 and A6400 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
Both Leica M10 and Sony A6400 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, M10 has scored 86, 3 points higher than A6400.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Leica M10 |
86 |
24.4 bits |
13.3 Evs |
2133 ISO |
Sony A6400 |
83 |
24.0 bits |
13.6 Evs |
1431 ISO |