Olympus E-M10 II has a 16.0MP Four Thirds (17.3 x 13 mm ) sized CMOS sensor and features TruePic VII processor. On the other hand, Sony A9 II has a 24.0MP Full frame (35.6 x 23.8 mm ) sized Stacked BSI-CMOS sensor and features BIONZ X processor.
Sony A9 II's sensor provides 8MP more than Olympus E-M10 II's sensor, which gives a significant advantage in real life. You can print your images larger or crop more freely.
On the other hand, please keep in mind that Max sensor resolution is not the only determinant of resolving power. Factors such as the optical elements, low pass filter, pixel size and sensor technology also affects the final resolution of the captured image.
Below you can see the E-M10 II and A9 Mark II sensor size comparison.
![Olympus E-M10 II vs Sony A9 II Sensor Size Comparison]()
Sensor Size and Resolution Comparison image of Olympus E-M10 II and Sony A9 II Cameras
As seen above, Sony A9 II has a 3.8x Larger sensor area than Olympus E-M10 II. 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. Olympus E-M10 II and Sony A9 II sensors have been tested by DxO and the results show that A9 Mark II has a better overall score of 93, 20 points higher compared to E-M10 II's score of 73.
| Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
|
Olympus E-M10 II |
73 |
23.1 bits |
12.5 Evs |
842 ISO |
|
Sony A9 II |
93 |
25.0 bits |
14.0 Evs |
3434 ISO |