Canon 1Ds has a
11.0MP Full frame (35.8 x 23.8 mm ) sized CMOS sensor . On the other hand, Canon 5D has a
13.0MP Full frame (36 x 24 mm ) sized CMOS sensor and features Digic II processor.
Below you can see the 1Ds and 5D sensor size comparison.
Sensor Size and Resolution Comparison image of Canon 1Ds and Canon 5D Cameras
Canon 1Ds and Canon 5D 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 and Canon 5D sensors have been tested by DxO and the results show that 5D has a better overall score of 71, 8 points higher compared to 1Ds's score of 63.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Canon 1Ds
63
21.8 bits
11.0 Evs
954 ISO
Canon 5D
71
22.9 bits
11.1 Evs
1368 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
or the
Canon 5D ,
including hyperfocal distance.