Canon ELPH 310 HS has a
12.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized BSI-CMOS sensor . On the other hand, Olympus VG-120 has a
14.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor and features TruePic III processor.
Below you can see the ELPH 310 HS and VG-120 sensor size comparison.
Sensor Size and Resolution Comparison image of Canon ELPH 310 HS and Olympus VG-120 Cameras
Canon ELPH 310 HS and Olympus VG-120 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
Canon ELPH 310 HS
or the
Olympus VG-120 ,
including hyperfocal distance.