Panasonic ZS7 has a
12.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor and features Venus Engine HD II processor. On the other hand, Nikon S8000 has a
14.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor and features Expeed C2 processor.
Below you can see the ZS7 and S8000 sensor size comparison.
Sensor Size and Resolution Comparison image of Panasonic ZS7 and Nikon S8000 Cameras
Panasonic ZS7 and Nikon S8000 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 ZS7
or the
Nikon S8000 ,
including hyperfocal distance.