Nikon P500 has a
12.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized BSI-CMOS sensor and features Expeed C2 processor. On the other hand, Canon SD3500 IS has a
14.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor and features Digic 4 processor.
Below you can see the P500 and SD3500 IS sensor size comparison.
Sensor Size and Resolution Comparison image of Nikon P500 and Canon SD3500 IS Cameras
Nikon P500 and Canon SD3500 IS 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.
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
Nikon P500
or the
Canon SD3500 IS ,
including hyperfocal distance.