Both Canon 1D X III and Canon 1D X II have Full frame sized 20.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the 1D X MIII and 1D X MII sensor size comparison.
Canon 1D X III and Canon 1D X II 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 1D X III and Canon 1D X II 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, 1D X MIII has scored 91, 3 points higher than 1D X MII.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Canon 1D X III |
91 |
24.2 bits |
14.5 Evs |
3248 ISO |
Canon 1D X II |
88 |
24.1 bits |
13.5 Evs |
3207 ISO |