Sony A68 has a
24.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor and features Bionz X processor. On the other hand, Sony A550 has a
14.0MP APS-C (23.4 x 15.6 mm ) sized CMOS sensor and features Bionz processor.
Sony A68's sensor provides 10MP more than Sony A550's sensor, which gives a significant advantage in real life. You can print your images larger or crop more freely.
On the other hand, please keep in mind that Max sensor resolution is not the only determinant of resolving power. Factors such as the optical elements, low pass filter, pixel size and sensor technology also affects the final resolution of the captured image.
Below you can see the A68 and A550 sensor size comparison.
Sony A68 and Sony A550 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
Both Sony A68 and Sony A550 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, A68 has scored 79, 13 points higher than A550.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Sony A68 |
79 |
24.1 bits |
13.5 Evs |
701 ISO |
Sony A550 |
66 |
21.9 bits |
11.8 Evs |
807 ISO |