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. On the other hand, 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.
Below you can see the EX-ZS5 and ELPH 520 HS sensor size comparison.
Sensor Size and Resolution Comparison image of Casio EX-ZS5 and Canon ELPH 520 HS Cameras
Casio EX-ZS5 and Canon ELPH 520 HS 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
Casio EX-ZS5
or the
Canon ELPH 520 HS ,
including hyperfocal distance.