Sony NEX-7 has a
24.0MP 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-7 and A3000 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony NEX-7 and Sony A3000 Cameras
Sony NEX-7 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 A3000 has 21% larger pixel area (18.50µm 2 vs 15.28µm 2 ) compared to Sony NEX-7, it has larger pixel area to collect light hence potential to have less noise in low light / High ISO images.
DxOMark Sensor Scores
Both Sony NEX-7 and Sony A3000 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, NEX-7 has scored 81, 3 points higher than A3000.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Sony NEX-7
81
24.1 bits
13.4 Evs
1016 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-7
or the
Sony A3000 ,
including hyperfocal distance.
