Casio EX-ZR700 has a
16.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CMOS sensor and features EXILIM Engine HS 3 processor. On the other hand, Nikon S4000 has a
12.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor and features Expeed C2 processor.
Below you can see the EX-ZR700 and S4000 sensor size comparison.
Sensor Size and Resolution Comparison image of Casio EX-ZR700 and Nikon S4000 Cameras
Casio EX-ZR700 and Nikon S4000 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. On the other hand, since Nikon S4000 has 32% larger pixel area (2.34µm 2 vs 1.76µm 2 ) compared to Casio EX-ZR700, it has larger pixel area to collect light hence potential to have less noise in low light / High ISO images.
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
Casio EX-ZR700
or the
Nikon S4000 ,
including hyperfocal distance.