Canon 1D MII has a
8.0MP APS-H (28.7 x 19.1 mm ) sized CMOS sensor . On the other hand, Canon 1D C has a
18.0MP Full frame (36 x 24 mm ) sized CMOS sensor and features Dual Digic 5+ processor.
Canon 1D C's sensor provides 10MP more than Canon 1D MII's sensor, which gives a significant advantage in real life. You can print your images larger or crop more freely.
On the other hand, please keep in mind that Max sensor resolution is not the only determinant of resolving power. Factors such as the optical elements, low pass filter, pixel size and sensor technology also affects the final resolution of the captured image.
Below you can see the 1D MII and 1D C sensor size comparison.
Sensor Size and Resolution Comparison image of Canon 1D MII and Canon 1D C Cameras
As seen above, Canon 1D C has a 1.6x Larger sensor area than Canon 1D MII. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in same focal length and aperture.
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
or the
Canon 1D C ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(APS-H versus Full frame),
so compare them at the same framing rather than the same focal length.
Put the same focal length on the smaller sensor and it will show less depth of
field, not more, because it also crops tighter. The calculator shows the
full frame equivalent focal length for each body so you can match the framing.