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 RX100 III has a
20.0MP 1″ (13.2 x 8.8 mm ) sized BSI-CMOS sensor and features Bionz X processor.
Below you can see the NEX-7 and RX100 III sensor size comparison.
Sensor Size and Resolution Comparison image of Sony NEX-7 and Sony RX100 III Cameras
As seen above, Sony NEX-7 has a 3.2x Larger sensor area than Sony RX100 III. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in same focal length and aperture.
DxOMark Sensor Scores
Both Sony NEX-7 and Sony RX100 III 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, 14 points higher than RX100 III.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Sony NEX-7
81
24.1 bits
13.4 Evs
1016 ISO
Sony RX100 III
67
22.4 bits
12.3 Evs
495 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 RX100 III ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(APS-C versus 1″ ),
so compare them at the same framing rather than the same focal length.
Put the same focal length on the smaller sensor and it will show less depth of
field, not more, because it also crops tighter. The calculator shows the
full frame equivalent focal length for each body so you can match the framing.
