Canon 400D has a 10.0MP APS-C (22.2 x 14.8 mm ) sized CMOS sensor . On the other hand, Nikon D700 has a 12.0MP Full frame (36 x 24 mm ) sized CMOS sensor and features Expeed processor.
Below you can see the 400D and D700 sensor size comparison.
Sensor Size and Resolution Comparison image of Canon 400D and Nikon D700 Cameras
As seen above, Nikon D700 has a 2.6x Larger sensor area than Canon 400D. 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 400D and Nikon D700 sensors have been tested by DxO and the results show that D700 has a better overall score of 80, 18 points higher compared to 400D's score of 62.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Canon 400D |
62 |
22.1 bits |
11.0 Evs |
664 ISO |
Nikon D700 |
80 |
23.5 bits |
12.2 Evs |
2303 ISO |