Both Olympus Tough-3000 and Sony W510 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 Tough-3000 and W510 sensor size comparison.
Sensor Size and Resolution Comparison image of Olympus Tough-3000 and Sony W510 Cameras
Olympus Tough-3000 and Sony W510 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
Olympus Tough-3000
or the
Sony W510 ,
including hyperfocal distance.
