Olympus 1 has a
12.0MP 1/1.7-inch (7.44 x 5.58 mm ) sized BSI-CMOS sensor and features TruePic VI 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 1 and E-M1 sensor size comparison.
As seen above, Olympus E-M1 has a 5.4x Larger sensor area than Olympus 1. 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. Olympus 1 and Olympus E-M1 sensors have been tested by DxO and the results show that E-M1 has a better overall score of 73, 22 points higher compared to 1's score of 51.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Olympus 1 |
51 |
20.7 bits |
11.6 Evs |
179 ISO |
Olympus E-M1 |
73 |
23.0 bits |
12.7 Evs |
757 ISO |