Sony A7 II has a
24.0MP Full frame (35.8 x 23.9 mm ) sized CMOS sensor and features Bionz X 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 A7 II and A850 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony A7 II and Sony A850 Cameras
Sony A7 II 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
Both Sony A7 II and Sony A850 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, A7 II has scored 90, 11 points higher than A850.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Sony A7 II
90
24.9 bits
13.6 Evs
2449 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
Sony A7 II
or the
Sony A850 ,
including hyperfocal distance.
