Samsung GX-20 has a
15.0MP APS-C (23.4 x 15.6 mm ) sized CMOS sensor . On the other hand, Pentax K-5 has a
16.0MP APS-C (23.7 x 15.7 mm ) sized CMOS sensor and features Prime II processor.
Below you can see the GX-20 and K-5 sensor size comparison.
Samsung GX-20 and Pentax K-5 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
DxOMark is a benchmark that scientifically assesses image quality of camera sensors. It 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. Samsung GX-20 and Pentax K-5 sensors have been tested by DxO and the results show that K-5 has a better overall score of 82, 14 points higher compared to GX-20's score of 68.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Samsung GX-20 |
68 |
23.1 bits |
11.2 Evs |
714 ISO |
Pentax K-5 |
82 |
23.7 bits |
14.1 Evs |
1162 ISO |