Olympus SZ-15 has a
16.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor . On the other hand, Panasonic ZS20 has a
14.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CMOS sensor .
Below you can see the SZ-15 and ZS20 sensor size comparison.
Sensor Size and Resolution Comparison image of Olympus SZ-15 and Panasonic ZS20 Cameras
Olympus SZ-15 and Panasonic ZS20 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
Olympus SZ-15
or the
Panasonic ZS20 ,
including hyperfocal distance.
