Nikon D3000 has a
10.0MP APS-C (23.6 x 15.8 mm ) sized CCD sensor and features Expeed processor. On the other hand, Canon 1100D has a
12.0MP APS-C (22.2 x 14.8 mm ) sized CMOS sensor and features Digic 4 processor.
Below you can see the D3000 and 1100D sensor size comparison.
Sensor Size and Resolution Comparison image of Nikon D3000 and Canon 1100D Cameras
As seen above, Nikon D3000 has a 1.1x Larger sensor area than Canon 1100D. 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
At Camera Decision, we also look at Dxo Mark sensors when available as we think it is a good indicator of image quality.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Nikon D3000
62
22.3 bits
11.1 Evs
563 ISO
Canon 1100D
62
21.9 bits
11.0 Evs
755 ISO
Sensor size sets the circle of confusion, so it drives how much depth of field each
of these bodies gives you at a given aperture. You can calculate it exactly for the
Nikon D3000
or the
Canon 1100D ,
including hyperfocal distance.