Both Sony A65 and Nikon D5200 have APS-C sized 24.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the A65 and D5200 sensor size comparison.
Sony A65 and Nikon D5200 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 A65 and Nikon D5200 sensors have been tested by DxO and the results show that D5200 has a better overall score of 84, 10 points higher compared to A65's score of 74.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Sony A65 |
74 |
23.4 bits |
12.6 Evs |
717 ISO |
Nikon D5200 |
84 |
24.2 bits |
13.9 Evs |
1284 ISO |