Panasonic FX90 has a
12.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor . On the other hand, Nikon P510 has a
16.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized BSI-CMOS sensor and features Expeed C2 processor.
Below you can see the FX90 and P510 sensor size comparison.
Sensor Size and Resolution Comparison image of Panasonic FX90 and Nikon P510 Cameras
Panasonic FX90 and Nikon P510 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 FX90
or the
Nikon P510 ,
including hyperfocal distance.