Sony HX30V has a
18.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized BSI-CMOS sensor and features BIONZ processor. On the other hand, Casio EX-ZR400 has a
16.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized BSI-CMOS sensor and features Exilim Engine HS processor.
Below you can see the HX30V and EX-ZR400 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony HX30V and Casio EX-ZR400 Cameras
Sony HX30V and Casio EX-ZR400 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
Sony HX30V
or the
Casio EX-ZR400 ,
including hyperfocal distance.