Both Canon 1Ds MIII and Canon 5D MII have Full frame sized 21.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the 1Ds MIII and 5D MII sensor size comparison.
Canon 1Ds MIII and Canon 5D MII 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
Both Canon 1Ds MIII and Canon 5D MII sensors have been tested by DxoMark. DxoMark 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. Of the two cameras that we are comparing, 1Ds MIII has scored 80, 1 points higher than 5D MII.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Canon 1Ds MIII |
80 |
24.0 bits |
12.0 Evs |
1663 ISO |
Canon 5D MII |
79 |
23.7 bits |
11.9 Evs |
1815 ISO |