Olympus E-P3 has a
12.0MP Four Thirds (17.3 x 13 mm ) sized CMOS sensor and features TruePic VI processor. On the other hand, Panasonic GX1 has a
16.0MP Four Thirds (17.3 x 13 mm ) sized CMOS sensor and features Venus Engine FHD processor.
Below you can see the E-P3 and GX1 sensor size comparison.
Olympus E-P3 and Panasonic GX1 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 compared to Panasonic GX1, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.
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. Olympus E-P3 and Panasonic GX1 sensors have been tested by DxO and the results show that GX1 has a better overall score of 55, 4 points higher compared to E-P3's score of 51.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Olympus E-P3 |
51 |
20.8 bits |
10.1 Evs |
536 ISO |
Panasonic GX1 |
55 |
20.8 bits |
10.6 Evs |
703 ISO |