Panasonic FH1 has a
12.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor . On the other hand, Pentax WG-1 GPS has a
14.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor .
Below you can see the FH1 and WG-1 GPS sensor size comparison.
Sensor Size and Resolution Comparison image of Panasonic FH1 and Pentax WG-1 GPS Cameras
Panasonic FH1 and Pentax WG-1 GPS 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 FH1
or the
Pentax WG-1 GPS ,
including hyperfocal distance.