Nikon D40 has a 6.0MP APS-C (23.7 x 15.5 mm ) sized CCD sensor . On the other hand, Nikon D3000 has a 10.0MP APS-C (23.6 x 15.8 mm ) sized CCD sensor and features Expeed processor.
Below you can see the D40 and D3000 sensor size comparison.
![Nikon D40 vs Nikon D3000 Sensor Size Comparison]()
Sensor Size and Resolution Comparison image of Nikon D40 and Nikon D3000 Cameras
Nikon D40 and Nikon D3000 have almost the same sensor size so none of them has any significant advantage over other in providing control over depth of field when used with 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 D40 and Nikon D3000 sensors have been tested by DxO and the results show that D3000 has a better overall score of 62, 6 points higher compared to D40's score of 56.
| Model |
Overall |
Color Depth |
Dynamic Range |
Low-light ISO |
|
Nikon D40 |
56 |
21.0 bits |
11.0 Evs |
561 ISO |
|
Nikon D3000 |
62 |
22.3 bits |
11.1 Evs |
563 ISO |