Nikon D3100 vs Nikon D40

Following is a thorough analysis of the Nikon D3100 versus Nikon D40, both Entry-Level DSLR digital cameras and both of them are manufactured by Nikon. There exists a noticeable gap between the sensor resolutions of the D3100 (14MP) and D40 (6MP) but both cameras have the same sensor sizing (APS-C).

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The D3100 was announced 4 years after the D40 which is quite a sizable difference as far as technology is concerned. Each of the cameras have the same body design (Compact SLR).

Before delving into a in-depth comparison, here is a quick view of how the D3100 scores against the D40 in the way of portability, imaging, features and an overall score.

Below is a preview of the gallery images for Nikon D3100 & Nikon D40. The whole galleries are available at Nikon D3100 Gallery & Nikon D40 Gallery.

When you are intending to carry around your camera regularly, you'll need to consider its weight and measurements. The Nikon D3100 comes with outer measurements of 124mm x 96mm x 75mm (4.9" x 3.8" x 3.0") with a weight of 505 grams (1.11 lbs) and the Nikon D40 has proportions of 124mm x 94mm x 64mm (4.9" x 3.7" x 2.5") along with a weight of 522 grams (1.15 lbs).

Look at the Nikon D3100 versus Nikon D40 in our brand new Camera & Lens Size Comparison Tool.

Don't forget, the weight of an ILC will differ based on the lens you use at that moment. Below is a front view measurements comparison of the D3100 against the D40.

Using dimensions and weight, the portability score of the D3100 and D40 is 68 and 71 respectively.

Quite often, its tough to see the gap between sensor sizes merely by looking at technical specs. The picture here will help give you a clearer sense of the sensor sizing in the D3100 and D40.

As you have seen, the two cameras have the same sensor dimensions albeit not the same resolution. You can expect the Nikon D3100 to give greater detail with its extra 8MP. Higher resolution will let you crop pictures a bit more aggressively. The younger D3100 is going to have an edge with regard to sensor innovation.