Panasonic GX850 has a
16.0MP Four Thirds (17.3 x 13 mm ) sized CMOS sensor and features Venus Engine processor. On the other hand, Panasonic GX8 has a
20.0MP Four Thirds (17.3 x 13 mm ) sized CMOS sensor and features Venus Engine processor.
Another difference between these two cameras is that Panasonic GX850's sensor lacks 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 moiré occurring in certain scenes.
Below you can see the GX850 and GX8 sensor size comparison.
Panasonic GX850 and Panasonic GX8 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 Panasonic GX850 has 27% larger pixel area compared to Panasonic GX8, 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. Panasonic GX850 and Panasonic GX8 sensors have been tested by DxO and the results show that GX8 has a better overall score of 75, 2 points higher compared to GX850's score of 73.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Panasonic GX850 |
73 |
23.2 bits |
13.3 Evs |
586 ISO |
Panasonic GX8 |
75 |
23.5 bits |
12.6 Evs |
806 ISO |