Sony A580 has a
16.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor and features Bionz processor. On the other hand, Sony A65 has a
24.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor and features Bionz processor.
Sony A65's sensor provides 8MP more than Sony A580'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 A580 and A65 sensor size comparison.
Sony A580 and Sony A65 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 A580 has 49% larger pixel area compared to Sony A65, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.
DxOMark Sensor Scores
Both Sony A580 and Sony A65 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, A580 has scored 80, 6 points higher than A65.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Sony A580 |
80 |
23.8 bits |
13.3 Evs |
1121 ISO |
Sony A65 |
74 |
23.4 bits |
12.6 Evs |
717 ISO |