Canon 1Ds MIII has a 21.0MP Full frame (36 x 24 mm ) sized CMOS sensor . On the other hand, Canon 1D X has a 18.0MP Full frame (36 x 24 mm ) sized CMOS sensor and features Dual Digic 5+ processor.
Below you can see the 1Ds MIII and 1D X sensor size comparison.
Sensor Size and Resolution Comparison image of Canon 1Ds MIII and Canon 1D X Cameras
Canon 1Ds MIII and Canon 1D X 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. On the other hand, since Canon 1D X has 17% larger pixel area (48.21µm2 vs 41.08µm2) compared to Canon 1Ds MIII, it has larger pixel area to collect light hence potential to have less noise in low light / High ISO images.
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 Canon 1D X sensors have been tested by DxO and the results show that 1D X has a better overall score of 82, 2 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 |
|
Canon 1D X |
82 |
23.8 bits |
11.8 Evs |
2786 ISO |