Both Sony A500 and Sony A700 have APS-C sized 12.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the A500 and A700 sensor size comparison.
Sony A500 and Sony A700 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.
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 A500 and Sony A700 sensors have been tested by DxO and the results show that A700 has a better overall score of 66, 2 points higher compared to A500's score of 64.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Sony A500 |
64 |
21.8 bits |
11.6 Evs |
772 ISO |
Sony A700 |
66 |
22.3 bits |
11.9 Evs |
581 ISO |