Both Sony A58 and Samsung NX200 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 A58 and NX200 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony A58 and Samsung NX200 Cameras
Sony A58 and Samsung NX200 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 A58 and Samsung NX200 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, A58 has scored 74, 5 points higher than NX200.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Sony A58
74
23.3 bits
12.5 Evs
753 ISO
Samsung NX200
69
22.6 bits
12.6 Evs
618 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 A58
or the
Samsung NX200 ,
including hyperfocal distance.
