Sony A580 has a
16.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor and features Bionz processor. On the other hand, Pentax K-x has a
12.0MP APS-C (23.6 x 15.8 mm ) sized CMOS sensor and features Prime processor.
Below you can see the A580 and K-x sensor size comparison.
Sony A580 and Pentax K-x have almost the same sensor size, so neither of them has any significant advantage over the other in terms of providing control over depth of field when used with the same focal length and aperture.
DxOMark Sensor Scores
Both Sony A580 and Pentax K-x sensors have been tested by DxoMark. DxoMark scores camera sensors for color depth (DXO Portrait), dynamic range (DXO Landscape) and low-light sensitivity (DXO Sports), and also gives them an overall score. Of the two cameras that we are comparing, A580 has scored 80, 8 points higher than K-x.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Sony A580 |
80 |
23.8 bits |
13.3 Evs |
1121 ISO |
Pentax K-x |
72 |
22.8 bits |
12.5 Evs |
811 ISO |