Both Sony a5000 and Samsung NX2000 have APS-C sized 20.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the a5000 and NX2000 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony a5000 and Samsung NX2000 Cameras
Sony a5000 and Samsung NX2000 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 Sony a5000 and Samsung NX2000 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, a5000 has scored 79, 4 points higher than NX2000.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Sony a5000
79
23.8 bits
13.0 Evs
1089 ISO
Samsung NX2000
75
23.4 bits
12.3 Evs
908 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
Sony a5000
or the
Samsung NX2000 ,
including hyperfocal distance.