Canon 1D X III has a
20.0MP Full frame (36 x 24 mm ) sized CMOS sensor and features Digic X processor. On the other hand, Leica M-Monochrom has a
18.0MP Full frame (36 x 24 mm ) sized Monochrome CCD sensor .
Below you can see the 1D X MIII and M-Monochrom sensor size comparison.
Sensor Size and Resolution Comparison image of Canon 1D X III and Leica M-Monochrom Cameras
Canon 1D X III and Leica M-Monochrom have the same sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture. On the other hand, since Leica M-Monochrom has 10% larger pixel area (47.73µm 2 vs 43.29µm 2 ) compared to Canon 1D X III, it has larger pixel area to collect light hence potential to have less noise in low light / High ISO images.
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 X III
or the
Leica M-Monochrom ,
including hyperfocal distance.
