Leica M10 has a
24.0MP Full frame (35.8 x 23.9 mm ) sized CMOS sensor and features Maestro II processor. On the other hand, Sony A7S has a
12.0MP Full frame (35.8 x 23.9 mm ) sized CMOS sensor and features Bionz X processor.
Leica M10's sensor provides 12MP more than Sony A7S's sensor, which gives a significant advantage in real life. You can print your images larger or crop more freely.
On the other hand, please keep in mind that Max sensor resolution is not the only determinant of resolving power. Factors such as the optical elements, low pass filter, pixel size and sensor technology also affects the final resolution of the captured image.
Below you can see the M10 and A7S sensor size comparison.
Sensor Size and Resolution Comparison image of Leica M10 and Sony A7S Cameras
Leica M10 and Sony A7S 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. On the other hand, since Sony A7S has 97% larger pixel area (71.24µm 2 vs 36.01µm 2 ) compared to Leica M10, it has larger pixel area to collect light hence potential to have less noise in low light / High ISO images.
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 and Sony A7S sensors have been tested by DxO and the results show that A7S has a better overall score of 87, 1 points higher compared to M10's score of 86.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Leica M10
86
24.4 bits
13.3 Evs
2133 ISO
Sony A7S
87
23.9 bits
13.2 Evs
3702 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
or the
Sony A7S ,
including hyperfocal distance.
