Canon 1D MII N has a
8.0MP APS-H (28.7 x 19.1 mm ) sized CMOS sensor . On the other hand, Canon 1D MIII has a
10.0MP APS-H (28.7 x 18.7 mm ) sized CMOS sensor .
Below you can see the 1D MII N and 1D MIII sensor size comparison.
Sensor Size and Resolution Comparison image of Canon 1D MII N and Canon 1D MIII Cameras
Canon 1D MII N and Canon 1D MIII 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 1D MII N and Canon 1D MIII sensors have been tested by DxO and the results show that 1D MIII has a better overall score of 71, 5 points higher compared to 1D MII N's score of 66.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Canon 1D MII N
66
22.3 bits
11.2 Evs
975 ISO
Canon 1D MIII
71
22.7 bits
11.7 Evs
1078 ISO
Sensor size sets the circle of confusion, so it drives how much depth of field each
of these bodies gives you at a given aperture. You can calculate it exactly for the
Canon 1D MII N
or the
Canon 1D MIII ,
including hyperfocal distance.