Nikon D3X has a
25.0MP Full frame (35.9 x 24 mm ) sized CMOS sensor and features Expeed processor. On the other hand, Canon 1Ds MIII has a
21.0MP Full frame (36 x 24 mm ) sized CMOS sensor .
Below you can see the D3X and 1Ds MIII sensor size comparison.
Sensor Size and Resolution Comparison image of Nikon D3X and Canon 1Ds MIII Cameras
Nikon D3X and Canon 1Ds 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
Both Nikon D3X and Canon 1Ds MIII 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, D3X has scored 88, 8 points higher than 1Ds MIII.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Nikon D3X
88
24.7 bits
13.7 Evs
1992 ISO
Canon 1Ds MIII
80
24.0 bits
12.0 Evs
1663 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
Nikon D3X
or the
Canon 1Ds MIII ,
including hyperfocal distance.
