Panasonic ZS60 has a
18.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CMOS sensor and features Venus Engine processor. On the other hand, Ricoh PX has a
16.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor and features Smooth Imaging Engine IV processor.
Below you can see the ZS60 and PX sensor size comparison.
Sensor Size and Resolution Comparison image of Panasonic ZS60 and Ricoh PX Cameras
Panasonic ZS60 and Ricoh PX have the same sensor sizes so they will provide same level of control over the depth of field when used with 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 ZS60
or the
Ricoh PX ,
including hyperfocal distance.