Both Canon G15 and Fujifilm XF1 have 12.0 MP resolution sensors but Canon G15's sensor is 1/1.7-inch (7.44 x 5.58 mm ) and Fujifilm XF1's sensor is 2/3-inch (8.8 x 6.6 mm ).
Since Fujifilm XF1'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 Canon G15.
Below you can see the G15 and XF1 sensor size comparison.
As seen above, Fujifilm XF1 has a 1.4x Larger sensor area than Canon G15. 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. Canon G15 and Fujifilm XF1 sensors have been tested by DxO and the results show that XF1 has a better overall score of 49, 3 points higher compared to G15's score of 46.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Canon G15 |
46 |
19.9 bits |
11.5 Evs |
165 ISO |
Fujifilm XF1 |
49 |
20.5 bits |
11.2 Evs |
199 ISO |