Canon G3 X has a
20.0MP 1″ (13.2 x 8.8 mm ) sized BSI-CMOS sensor and features DIGIC 6 processor. On the other hand, Olympus E-M1 has a
16.0MP Four Thirds (17.3 x 13 mm ) sized CMOS sensor and features TruePIC VII processor.
Below you can see the G3 X and E-M1 sensor size comparison.
As seen above, Olympus E-M1 has a 1.9x Larger sensor area than Canon G3 X. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in 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. Canon G3 X and Olympus E-M1 sensors have been tested by DxO and the results show that E-M1 has a better overall score of 73, 10 points higher compared to G3 X's score of 63.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Canon G3 X |
63 |
21.4 bits |
12.3 Evs |
521 ISO |
Olympus E-M1 |
73 |
23.0 bits |
12.7 Evs |
757 ISO |