Sony A550 has a 14.0MP APS-C (23.4 x 15.6 mm ) sized CMOS sensor and features Bionz processor. On the other hand, Sony A100 has a 10.0MP APS-C (23.6 x 15.8 mm ) sized CCD sensor .
Below you can see the A550 and A100 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony A550 and Sony A100 Cameras
Sony A550 and Sony A100 have almost the same sensor size so none of them has any significant advantage over other in providing control over depth of field when used with same focal length and aperture.
DxOMark Sensor Scores
Both Sony A550 and Sony A100 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, A550 has scored 66, 5 points higher than A100.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Sony A550 |
66 |
21.9 bits |
11.8 Evs |
807 ISO |
Sony A100 |
61 |
22.0 bits |
11.2 Evs |
476 ISO |