Both Panasonic GM5 and Olympus E-M10 have 16.0 MP resolution sensors but Panasonic GM5's sensor is Four Thirds (17.3 x 13 mm ) and Olympus E-M10's sensor is Four Thirds (17.3 x 13 mm ).
Since Olympus E-M10'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 GM5.
Below you can see the GM5 and E-M10 sensor size comparison.
Panasonic GM5 and Olympus E-M10 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 GM5 and Olympus E-M10 sensors have been tested by DxO and the results show that E-M10 has a better overall score of 72, 6 points higher compared to GM5's score of 66.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Panasonic GM5 |
66 |
22.1 bits |
11.7 Evs |
721 ISO |
Olympus E-M10 |
72 |
22.8 bits |
12.3 Evs |
884 ISO |