Both Sony A7c and Sony RX1 have 24.0 MP resolution sensors but Sony A7c's sensor is Full frame (35.8 x 23.8 mm ) and Sony RX1's sensor is Full frame (35.8 x 23.8 mm ).
Since Sony RX1'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 A7c.
Below you can see the A7c and RX1 sensor size comparison.
Sony A7c and Sony RX1 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
Both Sony A7c and Sony RX1 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, A7c has scored 95, 2 points higher than RX1.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Sony A7c |
95 |
25.0 bits |
14.7 Evs |
3407 ISO |
Sony RX1 |
93 |
25.1 bits |
14.3 Evs |
2534 ISO |