Both Leica M10-D and Sony A7 have Full frame sized 24.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the M10-D and A7 sensor size comparison.
Sensor Size and Resolution Comparison image of Leica M10-D and Sony A7 Cameras
Leica M10-D and Sony A7 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.
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. Leica M10-D and Sony A7 sensors have been tested by DxO and the results show that A7 has a better overall score of 90, 4 points higher compared to M10-D's score of 86.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Leica M10-D
86
24.4 bits
13.3 Evs
2133 ISO
Sony A7
90
24.8 bits
14.2 Evs
2248 ISO
Sensor size sets the circle of confusion, so it drives how much depth of field each
of these bodies gives you at a given aperture. You can calculate it exactly for the
Leica M10-D
or the
Sony A7 ,
including hyperfocal distance.
