Both Sony RX1R II and Sony A7R III have Full frame sized 42.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Another similarity between these two cameras is that both Sony A7R III and Sony RX1R II sensors lack anti-alias (Low-Pass) filters. Removing anti-alias filter increases the sharpness and level of detail but at the same time, it increases the chance of moiré occurring in certain scenes.
Below you can see the RX1R II and A7R III sensor size comparison.
Sony RX1R II and Sony A7R III 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.
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 RX1R II and Sony A7R III sensors have been tested by DxO and the results show that A7R III has a better overall score of 100, 3 points higher compared to RX1R II's score of 97.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Sony RX1R II |
97 |
25.8 bits |
13.9 Evs |
3204 ISO |
Sony A7R III |
100 |
26.0 bits |
14.7 Evs |
3523 ISO |