Nikon D80 has a
10.0MP APS-C (23.6 x 15.8 mm ) sized CCD sensor . 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.
Below you can see the D80 and A550 sensor size comparison.
Nikon D80 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
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. Nikon D80 and Sony A550 sensors have been tested by DxO and the results show that A550 has a better overall score of 66, 5 points higher compared to D80's score of 61.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Nikon D80 |
61 |
22.1 bits |
11.2 Evs |
524 ISO |
Sony A550 |
66 |
21.9 bits |
11.8 Evs |
807 ISO |