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, Canon 650D has a
18.0MP APS-C (22.3 x 14.9 mm ) sized CMOS sensor and features Digic 5 processor.
Below you can see the A550 and 650D sensor size comparison.
Sensor Size and Resolution Comparison image of Sony A550 and Canon 650D Cameras
Sony A550 and Canon 650D 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 A550 and Canon 650D 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, A550 has scored 66, 4 points higher than 650D.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Sony A550
66
21.9 bits
11.8 Evs
807 ISO
Canon 650D
62
21.7 bits
11.2 Evs
722 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
Canon 650D ,
including hyperfocal distance.
