Nikon D70 has a 6.0MP APS-C (23.7 x 15.5 mm ) sized CCD sensor . On the other hand, Nikon D90 has a 12.0MP APS-C (23.6 x 15.8 mm ) sized CMOS sensor .
Nikon D90's sensor provides 6MP more than Nikon D70'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 D70 and D90 sensor size comparison.
Sensor Size and Resolution Comparison image of Nikon D70 and Nikon D90 Cameras
Nikon D70 and Nikon D90 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. Nikon D70 and Nikon D90 sensors have been tested by DxO and the results show that D90 has a better overall score of 73, 23 points higher compared to D70's score of 50.
| Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
|
Nikon D70 |
50 |
20.4 bits |
10.3 Evs |
529 ISO |
|
Nikon D90 |
73 |
22.7 bits |
12.5 Evs |
977 ISO |