Pentax K-5 II has a
16.0MP APS-C (23.7 x 15.7 mm ) sized CMOS sensor and features Prime II processor. On the other hand, Nikon D70s has a
6.0MP APS-C (23.7 x 15.5 mm ) sized CCD sensor .
Pentax K-5 II's sensor provides 10MP more than Nikon D70s'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-5 II and D70s sensor size comparison.
Sensor Size and Resolution Comparison image of Pentax K-5 II and Nikon D70s Cameras
Pentax K-5 II and Nikon D70s 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-5 II and Nikon D70s 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-5 II has scored 82, 32 points higher than D70s.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Pentax K-5 II
82
23.8 bits
14.1 Evs
1235 ISO
Nikon D70s
50
20.4 bits
10.3 Evs
529 ISO
Sensor size sets the circle of confusion, so it drives how much depth of field each
of these bodies gives you at a given aperture. You can calculate it exactly for the
Pentax K-5 II
or the
Nikon D70s ,
including hyperfocal distance.
