Both Panasonic GX1 and Olympus E-M10 II have 16.0 MP resolution sensors but Panasonic GX1's sensor is Four Thirds (17.3 x 13 mm ) and Olympus E-M10 II's sensor is Four Thirds (17.3 x 13 mm ).
Since Olympus E-M10 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 Panasonic GX1.
Below you can see the GX1 and E-M10 II sensor size comparison.
Panasonic GX1 and Olympus E-M10 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
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. Panasonic GX1 and Olympus E-M10 II sensors have been tested by DxO and the results show that E-M10 II has a better overall score of 73, 18 points higher compared to GX1's score of 55.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Panasonic GX1 |
55 |
20.8 bits |
10.6 Evs |
703 ISO |
Olympus E-M10 II |
73 |
23.1 bits |
12.5 Evs |
842 ISO |