Olympus Tough-3000 has a
12.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor and features TruePic III processor. On the other hand, Samsung ST600 has a
14.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor .
Below you can see the Tough-3000 and ST600 sensor size comparison.
Sensor Size and Resolution Comparison image of Olympus Tough-3000 and Samsung ST600 Cameras
Olympus Tough-3000 and Samsung ST600 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. On the other hand, since Olympus Tough-3000 has 18% larger pixel area compared to Samsung ST600, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.
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 Tough-3000
or the
Samsung ST600 ,
including hyperfocal distance.