Sony A850 has a
25.0MP Full frame (35.9 x 24 mm ) sized CMOS sensor and features Bionz processor. On the other hand, Sony A7 has a
24.0MP Full frame (35.8 x 23.9 mm ) sized CMOS sensor and features Bionz X processor.
Below you can see the A850 and A7 sensor size comparison.
Sony A850 and Sony A7 have almost the same sensor size, so neither of them has any significant advantage over the other in terms of providing control over depth of field when used with the 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 A850 and Sony A7 sensors have been tested by DxO and the results show that A7 has a better overall score of 90, 11 points higher compared to A850's score of 79.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Sony A850 |
79 |
23.8 bits |
12.2 Evs |
1415 ISO |
Sony A7 |
90 |
24.8 bits |
14.2 Evs |
2248 ISO |