Both Pentax RS1500 and Kodak Z1485 IS have 14.0 MP resolution sensors but Pentax RS1500's sensor is 1/2.3-inch (6.17 x 4.55 mm ) and Kodak Z1485 IS's sensor is 1/1.72-inch (7.4 x 5.55 mm ).
Since Kodak Z1485 IS's has a larger sensor area with the same resolution, this means that it also has a larger pixel area hence better light collecting capacity for a given aperture compared to Pentax RS1500.
Below you can see the RS1500 and Z1485 IS sensor size comparison.
Sensor Size and Resolution Comparison image of Pentax RS1500 and Kodak Z1485 IS Cameras
As seen above, Kodak Z1485 IS has a 1.5x Larger sensor area than Pentax RS1500. 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
Pentax RS1500
or the
Kodak Z1485 IS ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(1/2.3-inch versus 1/1.72-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.
