Fujifilm X100 has a
12.0MP APS-C (23.6 x 15.8 mm ) sized CMOS sensor and features EXR processor. On the other hand, Sony A57 has a
16.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor .
Another difference between these two cameras is that Fujifilm X100's sensor lacks anti-alias (Low-Pass) filter. Removing anti-alias filter increases the sharpness and level of detail but at the same time, it increases the chance of moiré occurring in certain scenes.
Below you can see the X100 and A57 sensor size comparison.
Fujifilm X100 and Sony A57 have almost the same sensor size, so neither of them has any significant advantage over the other in terms of providing control over depth of field when used with the 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. Fujifilm X100 and Sony A57 sensors have been tested by DxO and the results show that A57 has a better overall score of 75, 2 points higher compared to X100's score of 73.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Fujifilm X100 |
73 |
22.9 bits |
12.4 Evs |
1001 ISO |
Sony A57 |
75 |
23.4 bits |
13.0 Evs |
785 ISO |