Both Pentax X-5 and Samsung Galaxy Camera 3G have 1/2.3-inch sized 16.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the X-5 and Galaxy Camera 3G sensor size comparison.
Sensor Size and Resolution Comparison image of Pentax X-5 and Samsung Galaxy Camera 3G Cameras
Pentax X-5 and Samsung Galaxy Camera 3G 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 X-5
or the
Samsung Galaxy Camera 3G ,
including hyperfocal distance.
