Both Sony A230 and Sony A300 have APS-C sized 10.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the A230 and A300 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony A230 and Sony A300 Cameras
Sony A230 and Sony A300 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
DxOMark is a benchmark that scientifically assesses image quality of camera sensors. It 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. Sony A230 and Sony A300 sensors have been tested by DxO and the results show that A300 has a better overall score of 64, 1 points higher compared to A230's score of 63.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Sony A230
63
22.3 bits
11.4 Evs
531 ISO
Sony A300
64
22.5 bits
11.4 Evs
538 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 A230
or the
Sony A300 ,
including hyperfocal distance.
