Canon 1Ds MIII has a
21.0MP Full frame (36 x 24 mm ) sized CMOS sensor . On the other hand, Nikon D3X has a
25.0MP Full frame (35.9 x 24 mm ) sized CMOS sensor and features Expeed processor.
Below you can see the 1Ds MIII and D3X sensor size comparison.
Sensor Size and Resolution Comparison image of Canon 1Ds MIII and Nikon D3X Cameras
Canon 1Ds MIII and Nikon D3X 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 1Ds MIII and Nikon D3X sensors have been tested by DxO and the results show that D3X has a better overall score of 88, 8 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
Nikon D3X
88
24.7 bits
13.7 Evs
1992 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 1Ds MIII
or the
Nikon D3X ,
including hyperfocal distance.
