Kodak Z1485 IS has a
14.0MP 1/1.72-inch (7.4 x 5.55 mm ) sized CCD sensor . On the other hand, Kodak M530 has a
12.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor .
Below you can see the Z1485 IS and M530 sensor size comparison.
As seen above, Kodak Z1485 IS has a 1.5x Larger sensor area than Kodak M530. 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.