Pentax Efina has a
14.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor . On the other hand, Panasonic FX78 has a
12.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor and features Venus Engine FHD processor.
Below you can see the Efina and FX78 sensor size comparison.
Sensor Size and Resolution Comparison image of Pentax Efina and Panasonic FX78 Cameras
Pentax Efina and Panasonic FX78 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
Pentax Efina
or the
Panasonic FX78 ,
including hyperfocal distance.