Olympus 8000 has a
12.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor . On the other hand, Canon SX30 IS has a
14.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor and features Digic 4 processor.
Below you can see the 8000 and SX30 IS sensor size comparison.
Sensor Size and Resolution Comparison image of Olympus 8000 and Canon SX30 IS Cameras
Olympus 8000 and Canon SX30 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
Olympus 8000
or the
Canon SX30 IS ,
including hyperfocal distance.