Canon 5D MII has a
21.0MP Full frame (36 x 24 mm ) sized CMOS sensor and features Digic 4 processor. On the other hand, Sony A850 has a
25.0MP Full frame (35.9 x 24 mm ) sized CMOS sensor and features Bionz processor.
Below you can see the 5D MII and A850 sensor size comparison.
Sensor Size and Resolution Comparison image of Canon 5D MII and Sony A850 Cameras
Canon 5D MII and Sony A850 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
Canon 5D MII
79
23.7 bits
11.9 Evs
1815 ISO
Sony A850
79
23.8 bits
12.2 Evs
1415 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
Canon 5D MII
or the
Sony A850 ,
including hyperfocal distance.
