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, Olympus SP-800 UZ has a
14.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor and features TruePic III processor.
Below you can see the Tough-3000 and SP-800 UZ sensor size comparison.
Sensor Size and Resolution Comparison image of Olympus Tough-3000 and Olympus SP-800 UZ Cameras
Olympus Tough-3000 and Olympus SP-800 UZ 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 Tough-3000
or the
Olympus SP-800 UZ ,
including hyperfocal distance.