Canon 7D has a
18.0MP APS-C (22.3 x 14.9 mm ) sized CMOS sensor and features Dual Digic 4 processor. On the other hand, Canon 70D has a
20.0MP APS-C (22.5 x 15 mm ) sized CMOS sensor and features Digic 5+ processor.
Below you can see the 7D and 70D sensor size comparison.
Canon 7D and Canon 70D have almost the same sensor size, so neither of them has any significant advantage over the other in terms of providing control over depth of field when used with the 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 7D and Canon 70D sensors have been tested by DxO and the results show that 70D has a better overall score of 68, 2 points higher compared to 7D's score of 66.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Canon 7D |
66 |
22.0 bits |
11.7 Evs |
854 ISO |
Canon 70D |
68 |
22.5 bits |
11.6 Evs |
926 ISO |