Pentax K-x has a
12.0MP APS-C (23.6 x 15.8 mm ) sized CMOS sensor and features Prime processor. On the other hand, Pentax K20D has a
15.0MP APS-C (23.4 x 15.6 mm ) sized CMOS sensor .
Below you can see the K-x and K20D sensor size comparison.
Pentax K-x and Pentax K20D 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 Pentax K-x and Pentax K20D 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, K-x has scored 72, 7 points higher than K20D.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Pentax K-x |
72 |
22.8 bits |
12.5 Evs |
811 ISO |
Pentax K20D |
65 |
22.9 bits |
11.1 Evs |
639 ISO |