Canon A3100 IS has a
12.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor . On the other hand, Panasonic FH7 has a
16.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor and features Venus Engine IV processor.
Below you can see the A3100 IS and FH7 sensor size comparison.
Sensor Size and Resolution Comparison image of Canon A3100 IS and Panasonic FH7 Cameras
Canon A3100 IS and Panasonic FH7 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
Canon A3100 IS
or the
Panasonic FH7 ,
including hyperfocal distance.