Panasonic GX1 has a
16.0MP Four Thirds (17.3 x 13 mm ) sized CMOS sensor and features Venus Engine FHD processor. On the other hand, Olympus E-P3 has a
12.0MP Four Thirds (17.3 x 13 mm ) sized CMOS sensor and features TruePic VI processor.
Below you can see the GX1 and E-P3 sensor size comparison.
Panasonic GX1 and Olympus E-P3 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. On the other hand, since Olympus E-P3 has 29% larger pixel area (18.45µm2 vs 14.21µm2) compared to Panasonic GX1, it has larger pixel area to collect light hence potential to have less noise in low light / High ISO images.
DxOMark Sensor Scores
Both Panasonic GX1 and Olympus E-P3 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, GX1 has scored 55, 4 points higher than E-P3.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Panasonic GX1 |
55 |
20.8 bits |
10.6 Evs |
703 ISO |
Olympus E-P3 |
51 |
20.8 bits |
10.1 Evs |
536 ISO |