Panasonic FS25 has a
12.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor . On the other hand, Fujifilm S4800 has a
16.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor .
Below you can see the FS25 and S4800 sensor size comparison.
Sensor Size and Resolution Comparison image of Panasonic FS25 and Fujifilm S4800 Cameras
Panasonic FS25 and Fujifilm S4800 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
Panasonic FS25
or the
Fujifilm S4800 ,
including hyperfocal distance.