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, Samsung NX200 has a
20.0MP APS-C (23.5 x 15.7 mm ) sized CMOS sensor .
Samsung NX200's sensor provides 8MP more than Pentax K-x's sensor, which gives a significant advantage in real life. You can print your images larger or crop more freely.
On the other hand, please keep in mind that Max sensor resolution is not the only determinant of resolving power. Factors such as the optical elements, low pass filter, pixel size and sensor technology also affects the final resolution of the captured image.
Below you can see the K-x and NX200 sensor size comparison.
Pentax K-x and Samsung NX200 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 Samsung NX200 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, 3 points higher than NX200.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Pentax K-x |
72 |
22.8 bits |
12.5 Evs |
811 ISO |
Samsung NX200 |
69 |
22.6 bits |
12.6 Evs |
618 ISO |