Both Olympus E-M5 II and Panasonic GH3 have 16.0 MP resolution sensors but Olympus E-M5 II's sensor is Four Thirds (17.3 x 13 mm ) and Panasonic GH3's sensor is Four Thirds (17.3 x 13 mm ).
Since Panasonic GH3'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 Olympus E-M5 II.
Below you can see the E-M5 Mark II and GH3 sensor size comparison.
Olympus E-M5 II and Panasonic GH3 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 Olympus E-M5 II and Panasonic GH3 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, E-M5 Mark II has scored 73, 2 points higher than GH3.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Olympus E-M5 II |
73 |
23.0 bits |
12.4 Evs |
896 ISO |
Panasonic GH3 |
71 |
22.7 bits |
12.4 Evs |
812 ISO |