Sony A55 has a
16.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor and features Bionz processor. On the other hand, Panasonic GF2 has a
12.0MP Four Thirds (17.3 x 13 mm ) sized CMOS sensor and features Venus Engine FHD processor.
Below you can see the A55 and GF2 sensor size comparison.
As seen above, Sony A55 has a 1.6x Larger sensor area than Panasonic GF2. 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
Both Sony A55 and Panasonic GF2 sensors have been tested by DxoMark. DxoMark 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. Of the two cameras that we are comparing, A55 has scored 73, 19 points higher than GF2.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Sony A55 |
73 |
23.0 bits |
12.4 Evs |
816 ISO |
Panasonic GF2 |
54 |
21.2 bits |
10.3 Evs |
506 ISO |