Nikon D300S has a
12.0MP APS-C (23.6 x 15.8 mm ) sized CMOS sensor and features Expeed 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 D300S and K20D sensor size comparison.
Nikon D300S 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 Nikon D300S 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, D300S has scored 70, 5 points higher than K20D.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Nikon D300S |
70 |
22.5 bits |
12.2 Evs |
787 ISO |
Pentax K20D |
65 |
22.9 bits |
11.1 Evs |
639 ISO |