Both Sony RX10 and Panasonic FZ2500 have 20.0 MP resolution sensors but Sony RX10's sensor is 1-inch (13.2 x 8.8 mm ) and Panasonic FZ2500's sensor is 1″ (13.2 x 8.8 m ).
Since Sony RX10'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 Panasonic FZ2500.
Below you can see the RX10 and FZ2500 sensor size comparison.
Sony RX10 and Panasonic FZ2500 have almost the same sensor size, so neither of them has any significant advantage over the other in terms of providing control over depth of field when used with the 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 RX10 and Panasonic FZ2500 sensors have been tested by DxO and the results show that FZ2500 has a better overall score of 70, 1 points higher compared to RX10's score of 69.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Sony RX10 |
69 |
22.9 bits |
12.6 Evs |
474 ISO |
Panasonic FZ2500 |
70 |
23.0 bits |
12.6 Evs |
538 ISO |