Both Panasonic GM5 and Panasonic GX85 have Four Thirds sized 16.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
One other difference between these two cameras that is worth mentioning is that Panasonic GX85'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 moiré occurring in certain scenes.
Below you can see the GM5 and GX85 sensor size comparison.
Panasonic GM5 and Panasonic GX85 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. Panasonic GM5 and Panasonic GX85 sensors have been tested by DxO and the results show that GX85 has a better overall score of 71, 5 points higher compared to GM5's score of 66.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Panasonic GM5 |
66 |
22.1 bits |
11.7 Evs |
721 ISO |
Panasonic GX85 |
71 |
22.9 bits |
12.6 Evs |
662 ISO |