Olympus TG-310 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 FH27 has a
16.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor and features Venus Engine VI processor.
Below you can see the TG-310 and FH27 sensor size comparison.
Sensor Size and Resolution Comparison image of Olympus TG-310 and Panasonic FH27 Cameras
Olympus TG-310 and Panasonic FH27 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 TG-310
or the
Panasonic FH27 ,
including hyperfocal distance.