Both Sony RX10 and Olympus PEN-F have 20.0 MP resolution sensors but Sony RX10's sensor is 1-inch (13.2 x 8.8 mm ) and Olympus PEN-F's sensor is Four Thirds (17.3 x 13 mm ).
Since Olympus PEN-F's has a larger sensor area with the same resolution, this means that it also has a larger pixel area hence better light collecting capacity for a given aperture compared to Sony RX10.
Below you can see the RX10 and PEN-F sensor size comparison.
As seen above, Olympus PEN-F has a 1.9x Larger sensor area than Sony RX10. 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 RX10 and Olympus PEN-F sensors have been tested by DxO and the results show that PEN-F has a better overall score of 74, 5 points higher compared to RX10's score of 69.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Sony RX10 |
69 |
22.9 bits |
12.6 Evs |
474 ISO |
Olympus PEN-F |
74 |
23.1 bits |
12.4 Evs |
894 ISO |