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, Sony A57 has a
16.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor .
Below you can see the 1 and A57 sensor size comparison.
As seen above, Sony A57 has a 8.8x 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 Sony A57 sensors have been tested by DxO and the results show that A57 has a better overall score of 75, 24 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 |
Sony A57 |
75 |
23.4 bits |
13.0 Evs |
785 ISO |