Nikon D70s has a
6.0MP APS-C (23.7 x 15.5 mm ) sized CCD sensor . On the other hand, Canon 77D has a
24.0MP APS-C (22.3 x 14.9 mm ) sized CMOS sensor and features DIGIC 7 processor.
Canon 77D's sensor provides 18MP more than Nikon D70s's sensor, which gives a significant advantage in real life. You can print your images larger or crop more freely.
On the other hand, please keep in mind that Max sensor resolution is not the only determinant of resolving power. Factors such as the optical elements, low pass filter, pixel size and sensor technology also affects the final resolution of the captured image.
Below you can see the D70s and 77D sensor size comparison.
As seen above, Nikon D70s has a 1.1x Larger sensor area than Canon 77D. 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. Nikon D70s and Canon 77D sensors have been tested by DxO and the results show that 77D has a better overall score of 78, 28 points higher compared to D70s's score of 50.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Nikon D70s |
50 |
20.4 bits |
10.3 Evs |
529 ISO |
Canon 77D |
78 |
23.6 bits |
13.3 Evs |
971 ISO |