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. On the other hand, 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.
Below you can see the SD3500 IS and P500 sensor size comparison.
Sensor Size and Resolution Comparison image of Canon SD3500 IS and Nikon P500 Cameras
Canon SD3500 IS and Nikon P500 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
Canon SD3500 IS
or the
Nikon P500 ,
including hyperfocal distance.