Both Pentax K-5 IIs and Pentax K-50 have APS-C sized 16.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Another difference between these two cameras is that Pentax K-5 IIs's sensor lacks anti-alias (Low-Pass) filter. Removing anti-alias filter increases the sharpness and level of detail but at the same time, it increases the chance of moiré occurring in certain scenes.
Below you can see the K-5 IIs and K-50 sensor size comparison.
Sensor Size and Resolution Comparison image of Pentax K-5 IIs and Pentax K-50 Cameras
Pentax K-5 IIs and Pentax K-50 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-5 IIs and Pentax K-50 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 IIs has scored 82, 3 points higher than K-50.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Pentax K-5 IIs
82
23.9 bits
14.1 Evs
1208 ISO
Pentax K-50
79
23.7 bits
13.0 Evs
1120 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 IIs
or the
Pentax K-50 ,
including hyperfocal distance.
