Sony A290 has a
14.0MP APS-C (23.5 x 15.7 mm ) sized CCD sensor and features Bionz processor. On the other hand, Sony A230 has a
10.0MP APS-C (23.5 x 15.7 mm ) sized CCD sensor and features Bionz processor.
Below you can see the A290 and A230 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony A290 and Sony A230 Cameras
Sony A290 and Sony A230 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. On the other hand, since Sony A230 has 39% larger pixel area (36.75µm 2 vs 26.30µm 2 ) compared to Sony A290, it has larger pixel area to collect light hence potential to have less noise in low light / High ISO images.
DxOMark Sensor Scores
Both Sony A290 and Sony A230 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, A290 has scored 66, 3 points higher than A230.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Sony A290
66
22.6 bits
11.5 Evs
615 ISO
Sony A230
63
22.3 bits
11.4 Evs
531 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 A290
or the
Sony A230 ,
including hyperfocal distance.
