Both Panasonic GX1 and Olympus E-PL5 have Four Thirds sized 16.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the GX1 and E-PL5 sensor size comparison.
Panasonic GX1 and Olympus E-PL5 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-PL5 sensors have been tested by DxO and the results show that E-PL5 has a better overall score of 72, 17 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-PL5 |
72 |
22.8 bits |
12.3 Evs |
889 ISO |