Both Pentax K-x and Nikon D300S have APS-C sized 12.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the K-x and D300S sensor size comparison.
Pentax K-x and Nikon D300S have the same sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture.
DxOMark Sensor Scores
Both Pentax K-x and Nikon D300S 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, 2 points higher than D300S.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Pentax K-x |
72 |
22.8 bits |
12.5 Evs |
811 ISO |
Nikon D300S |
70 |
22.5 bits |
12.2 Evs |
787 ISO |