Sigma DP3 Merrill has a
15.0MP APS-C (24 x 16 mm ) sized CMOS (Foveon X3) sensor and features Dual TRUE II engine processor. On the other hand, Canon 60D has a
18.0MP APS-C (22.3 x 14.9 mm ) sized CMOS sensor and features Digic 4 processor.
Below you can see the DP3 Merrill and 60D sensor size comparison.
Sensor Size and Resolution Comparison image of Sigma DP3 Merrill and Canon 60D Cameras
As seen above, Sigma DP3 Merrill has a 1.2x Larger sensor area than Canon 60D. 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
Sigma DP3 Merrill
or the
Canon 60D ,
including hyperfocal distance.