Both Sony RX100 III and Sony RX100 II have 20.0 MP resolution sensors but Sony RX100 III's sensor is 1″ (13.2 x 8.8 mm ) and Sony RX100 II's sensor is 1-inch (13.2 x 8.8 mm ).
Since Sony RX100 II'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 RX100 III.
Below you can see the RX100 III and RX100 II sensor size comparison.
Sensor Size and Resolution Comparison image of Sony RX100 III and Sony RX100 II Cameras
Sony RX100 III and Sony RX100 II 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
At Camera Decision, we also look at Dxo Mark sensors when available as we think it is a good indicator of image quality.
| Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
|
Sony RX100 III |
67 |
22.4 bits |
12.3 Evs |
495 ISO |
|
Sony RX100 II |
67 |
22.5 bits |
12.4 Evs |
483 ISO |