Both Fujifilm F550 EXR and Panasonic GX85 have 16.0 MP resolution sensors but Fujifilm F550 EXR's sensor is 1/2-inch (6.4 x 4.8 mm ) and Panasonic GX85's sensor is Four Thirds (17.3 x 13 mm ).
Since Panasonic GX85'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 Fujifilm F550 EXR.
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 F550 EXR and GX85 sensor size comparison.
As seen above, Panasonic GX85 has a 7.3x Larger sensor area than Fujifilm F550 EXR. 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. Fujifilm F550 EXR and Panasonic GX85 sensors have been tested by DxO and the results show that GX85 has a better overall score of 71, 32 points higher compared to F550 EXR's score of 39.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Fujifilm F550 EXR |
39 |
19.2 bits |
10.6 Evs |
158 ISO |
Panasonic GX85 |
71 |
22.9 bits |
12.6 Evs |
662 ISO |