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. On the other hand, Panasonic FS25 has a
12.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor .
Below you can see the SP-800 UZ and FS25 sensor size comparison.
Sensor Size and Resolution Comparison image of Olympus SP-800 UZ and Panasonic FS25 Cameras
Olympus SP-800 UZ and Panasonic FS25 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 SP-800 UZ
or the
Panasonic FS25 ,
including hyperfocal distance.