Canon 1Ds MIII has a
21.0MP Full frame (36 x 24 mm ) sized CMOS sensor . On the other hand, Sony A9 has a
24.0MP Full frame (35.6 x 23.8 mm ) sized Stacked BSI-CMOS sensor and features BIONZ X processor.
Below you can see the 1Ds MIII and A9 sensor size comparison.
Canon 1Ds MIII and Sony A9 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. Canon 1Ds MIII and Sony A9 sensors have been tested by DxO and the results show that A9 has a better overall score of 92, 12 points higher compared to 1Ds MIII's score of 80.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Canon 1Ds MIII |
80 |
24.0 bits |
12.0 Evs |
1663 ISO |
Sony A9 |
92 |
24.9 bits |
13.3 Evs |
3517 ISO |