Canon SD990 IS has a
15.0MP 1/1.7-inch (7.44 x 5.58 mm ) sized CCD sensor . On the other hand, Sony HX30V has a
18.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized BSI-CMOS sensor and features BIONZ processor.
Below you can see the SD990 IS and HX30V sensor size comparison.
Sensor Size and Resolution Comparison image of Canon SD990 IS and Sony HX30V Cameras
As seen above, Canon SD990 IS has a 1.5x Larger sensor area than Sony HX30V. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in 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 SD990 IS
or the
Sony HX30V ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(1/1.7-inch versus 1/2.3-inch),
so compare them at the same framing rather than the same focal length.
Put the same focal length on the smaller sensor and it will show less depth of
field, not more, because it also crops tighter. The calculator shows the
full frame equivalent focal length for each body so you can match the framing.
