Sony RX100 III has a
20.0MP 1″ (13.2 x 8.8 mm ) sized BSI-CMOS sensor and features Bionz X processor. On the other hand, Sony RX1 has a
24.0MP Full frame (35.8 x 23.8 mm ) sized CMOS sensor .
Below you can see the RX100 III and RX1 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony RX100 III and Sony RX1 Cameras
As seen above, Sony RX1 has a 7.3x 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
DxOMark is a benchmark that scientifically assesses image quality of camera sensors. It 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. Sony RX100 III and Sony RX1 sensors have been tested by DxO and the results show that RX1 has a better overall score of 93, 26 points higher compared to RX100 III's score of 67.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Sony RX100 III
67
22.4 bits
12.3 Evs
495 ISO
Sony RX1
93
25.1 bits
14.3 Evs
2534 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 RX100 III
or the
Sony RX1 ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(1″ versus Full frame),
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.
