Sony W550 has a
14.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor and features BIONZ processor. On the other hand, Sony W570 has a
16.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor and features BIONZ processor.
Below you can see the W550 and W570 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony W550 and Sony W570 Cameras
Sony W550 and Sony W570 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. On the other hand, since Sony W550 has 14% larger pixel area compared to Sony W570, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.
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
Sony W550
or the
Sony W570 ,
including hyperfocal distance.
