Sony A580 has a
16.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor and features Bionz processor. On the other hand, Nikon D90 has a
12.0MP APS-C (23.6 x 15.8 mm ) sized CMOS sensor .
Below you can see the A580 and D90 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony A580 and Nikon D90 Cameras
Sony A580 and Nikon D90 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 A580 and Nikon D90 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, A580 has scored 80, 7 points higher than D90.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Sony A580
80
23.8 bits
13.3 Evs
1121 ISO
Nikon D90
73
22.7 bits
12.5 Evs
977 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 A580
or the
Nikon D90 ,
including hyperfocal distance.
