Both Sony A7c and Sony A7 III 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 A7c and A7 III sensor size comparison.
Sensor Size and Resolution Comparison image of Sony A7c and Sony A7 III Cameras
Sony A7c and Sony A7 III 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. Sony A7c and Sony A7 III sensors have been tested by DxO and the results show that A7 III has a better overall score of 96, 1 points higher compared to A7c's score of 95.
| Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
|
Sony A7c |
95 |
25.0 bits |
14.7 Evs |
3407 ISO |
|
Sony A7 III |
96 |
25.0 bits |
14.7 Evs |
3730 ISO |