Sony NEX-6 has a
16.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor and features Bionz processor. On the other hand, Sony A3000 has a
20.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor and features BIONZ processor.
Below you can see the NEX-6 and A3000 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony NEX-6 and Sony A3000 Cameras
Sony NEX-6 and Sony A3000 have the same sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture. On the other hand, since Sony NEX-6 has 23% larger pixel area compared to Sony A3000, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.
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 NEX-6
78
23.7 bits
13.1 Evs
1018 ISO
Sony A3000
78
23.7 bits
12.8 Evs
1068 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 NEX-6
or the
Sony A3000 ,
including hyperfocal distance.