Both Olympus E-P1 and Panasonic G1 have Four Thirds sized 12.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the E-P1 and G1 sensor size comparison.
Olympus E-P1 and Panasonic G1 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-P1 and Panasonic G1 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-P1 has scored 55, 2 points higher than G1.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Olympus E-P1 |
55 |
21.4 bits |
10.4 Evs |
536 ISO |
Panasonic G1 |
53 |
21.1 bits |
10.3 Evs |
463 ISO |