Canon 6D MII has a 26.0MP Full frame (35.9 x 24 mm ) sized CMOS sensor and features DIGIC 7 processor. On the other hand, Sony A99 II has a 42.0MP Full frame (35.9 x 24 mm ) sized BSI-CMOS sensor and features Bionz X processor.
Sony A99 II's sensor provides 16MP more than Canon 6D MII'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.
One other difference between these two cameras that is worth mentioning is that Sony A99 II's sensor doesn't have an anti-alias (Low-Pass) filter. Removing anti-alias filter increases the sharpness and level of detail but at the same time, it increases the chance of moire occurring in certain scenes.
Below you can see the 6D MII and A99 II sensor size comparison.
![Canon 6D MII vs Sony A99 II Sensor Size Comparison]()
Sensor Size and Resolution Comparison image of Canon 6D MII and Sony A99 II Cameras
Canon 6D MII and Sony A99 II 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. On the other hand, since Canon 6D MII has 62% larger pixel area compared to Sony A99 II, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.
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. Canon 6D MII and Sony A99 II sensors have been tested by DxO and the results show that A99 II has a better overall score of 92, 7 points higher compared to 6D MII's score of 85.
| Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
|
Canon 6D MII |
85 |
24.4 bits |
11.9 Evs |
2862 ISO |
|
Sony A99 II |
92 |
25.4 bits |
13.4 Evs |
2317 ISO |