Canon 1D MII has a
8.0MP APS-H (28.7 x 19.1 mm ) sized CMOS sensor . On the other hand, Nikon D5500 has a
24.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor and features Expeed 4 processor.
Nikon D5500's sensor provides 16MP more than Canon 1D MII'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.
One other difference between these two cameras that is worth mentioning is that Nikon D5500's sensor doesn't have an anti-alias (Low-Pass) filter. Removing anti-alias filter increases the sharpness and level of detail but at the same time, it increases the chance of moiré occurring in certain scenes.
Below you can see the 1D MII and D5500 sensor size comparison.
As seen above, Canon 1D MII has a 1.5x Larger sensor area than Nikon D5500. 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 1D MII and Nikon D5500 sensors have been tested by DxO and the results show that D5500 has a better overall score of 84, 18 points higher compared to 1D MII's score of 66.
Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
Canon 1D MII |
66 |
22.3 bits |
11.1 Evs |
1003 ISO |
Nikon D5500 |
84 |
24.1 bits |
14.0 Evs |
1438 ISO |