Both Nikon D70 and Canon 300D have APS-C sized 6.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the D70 and 300D sensor size comparison.
Nikon D70 and Canon 300D 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 Canon 300D sensors have been tested by DxO and the results show that 300D has a better overall score of 55, 5 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 |
Canon 300D |
55 |
21.0 bits |
10.8 Evs |
544 ISO |