Sony A550 has a
14.0MP APS-C (23.4 x 15.6 mm ) sized CMOS sensor and features Bionz processor. On the other hand, Sony A700 has a
12.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor .
Below you can see the A550 and A700 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony A550 and Sony A700 Cameras
Sony A550 and Sony A700 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
At Camera Decision, we also look at Dxo Mark sensors when available as we think it is a good indicator of image quality.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Sony A550
66
21.9 bits
11.8 Evs
807 ISO
Sony A700
66
22.3 bits
11.9 Evs
581 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 A550
or the
Sony A700 ,
including hyperfocal distance.
