Both Sony A850 and Sony A900 have Full frame sized 25.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the A850 and A900 sensor size comparison.
Sony A850 and Sony A900 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
At Camera Decision, we also look at Dxo Mark sensors when available as we think it is a good indicator of image quality.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Sony A850 |
79 |
23.8 bits |
12.2 Evs |
1415 ISO |
Sony A900 |
79 |
23.7 bits |
12.3 Evs |
1431 ISO |