Sony A300 has a
10.0MP APS-C (23.6 x 15.8 mm ) sized CCD sensor . On the other hand, Nikon D90 has a
12.0MP APS-C (23.6 x 15.8 mm ) sized CMOS sensor .
Below you can see the A300 and D90 sensor size comparison.
Sony A300 and Nikon D90 have the same sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture. On the other hand, since Sony A300 has 21% larger pixel area compared to Nikon D90, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.
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. Sony A300 and Nikon D90 sensors have been tested by DxO and the results show that D90 has a better overall score of 73, 9 points higher compared to A300's score of 64.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Sony A300 |
64 |
22.5 bits |
11.4 Evs |
538 ISO |
Nikon D90 |
73 |
22.7 bits |
12.5 Evs |
977 ISO |