Sigma DP1x has a
5.0MP APS-C (20.7 x 13.8 mm ) sized CMOS (Foveon X3) sensor and features True II processor. On the other hand, Pentax K100D S has a
6.0MP APS-C (23.5 x 15.7 mm ) sized CCD sensor .
Below you can see the DP1x and K100D Super sensor size comparison.
Sensor Size and Resolution Comparison image of Sigma DP1x and Pentax K100D S Cameras
As seen above, Pentax K100D S has a 1.3x Larger sensor area than Sigma DP1x. 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
Sigma DP1x
or the
Pentax K100D S ,
including hyperfocal distance.
