Pentax K20D has a
15.0MP APS-C (23.4 x 15.6 mm ) sized CMOS sensor . On the other hand, Panasonic GX1 has a
16.0MP Four Thirds (17.3 x 13 mm ) sized CMOS sensor and features Venus Engine FHD processor.
Below you can see the K20D and GX1 sensor size comparison.
As seen above, Pentax K20D has a 1.6x Larger sensor area than Panasonic GX1. 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.
DxOMark Sensor Scores
Both Pentax K20D and Panasonic GX1 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, K20D has scored 65, 10 points higher than GX1.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Pentax K20D |
65 |
22.9 bits |
11.1 Evs |
639 ISO |
Panasonic GX1 |
55 |
20.8 bits |
10.6 Evs |
703 ISO |