Samsung ST80 has a
14.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor . On the other hand, Olympus SH-50 has a
16.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized BSI-CMOS sensor and features TruePic VI processor.
Below you can see the ST80 and SH-50 sensor size comparison.
Sensor Size and Resolution Comparison image of Samsung ST80 and Olympus SH-50 Cameras
Samsung ST80 and Olympus SH-50 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
Samsung ST80
or the
Olympus SH-50 ,
including hyperfocal distance.