Canon G7 X has a
20.0MP 1″ (13.2 x 8.8 mm ) sized BSI-CMOS sensor and features DIGIC 6 processor. On the other hand, Sony A7 has a
24.0MP Full frame (35.8 x 23.9 mm ) sized CMOS sensor and features Bionz X processor.
Below you can see the G7 X and A7 sensor size comparison.
As seen above, Sony A7 has a 7.4x Larger sensor area than Canon G7 X. 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 G7 X and Sony A7 sensors have been tested by DxO and the results show that A7 has a better overall score of 90, 19 points higher compared to G7 X's score of 71.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Canon G7 X |
71 |
23.0 bits |
12.7 Evs |
556 ISO |
Sony A7 |
90 |
24.8 bits |
14.2 Evs |
2248 ISO |