Canon ELPH 520 HS has a
10.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized BSI-CMOS sensor and features DIGIC 5 processor. On the other hand, Casio EX-ZS5 has a
14.0MP 1/2.3-inch (6.16 x 4.62 mm ) sized CCD sensor and features Exilim Engine 5.0 processor.
Below you can see the ELPH 520 HS and EX-ZS5 sensor size comparison.
Sensor Size and Resolution Comparison image of Canon ELPH 520 HS and Casio EX-ZS5 Cameras
Canon ELPH 520 HS and Casio EX-ZS5 have almost the same sensor size, so neither of them has any significant advantage over the other in terms of providing control over depth of field when used with the 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 ELPH 520 HS
or the
Casio EX-ZS5 ,
including hyperfocal distance.