Both Samsung SL820 and Canon SX130 IS have 1/2.3-inch sized 12.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the SL820 and SX130 IS sensor size comparison.
Sensor Size and Resolution Comparison image of Samsung SL820 and Canon SX130 IS Cameras
Samsung SL820 and Canon SX130 IS 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
Samsung SL820
or the
Canon SX130 IS ,
including hyperfocal distance.
