Nikon D3100 vs Pentax K20D

On this page, we are looking at the Nikon D3100 and Pentax K20D, former being a Entry-Level DSLR while the other is a Advanced DSLR by rivals Nikon and Pentax. The sensor resolution of the D3100 (14MP) and the K20D (15MP) is very close and both cameras have the same sensor size (APS-C).

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The D3100 was launched 2 years later than the K20D and that is a fairly significant difference as far as camera tech is concerned. Both of these cameras have different body design with the Nikon D3100 being a Compact SLR camera and the Pentax K20D being a Mid-size SLR camera.

Before getting into a detailed comparison, here is a concise introduction of how the D3100 grades versus the K20D with regards to portability, imaging, features and an overall grade.

This is a sample of the gallery pics for Nikon D3100 & Pentax K20D. The complete galleries are provided at Nikon D3100 Gallery & Pentax K20D Gallery.

For anybody who is looking to lug around your camera regularly, you will have to factor its weight and dimensions. The Nikon D3100 has exterior dimensions 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 Pentax K20D has dimensions of 142mm x 101mm x 70mm (5.6" x 4.0" x 2.8") and a weight of 800 grams (1.76 lbs).

Check the Nikon D3100 and Pentax K20D in our completely new Camera plus Lens Size Comparison Tool.

Remember that, the weight of an ILC will change based on the lens you are utilising at that time. The following is a front view proportions comparison of the D3100 compared to the K20D.

Looking at size and weight, the portability grade of the D3100 and K20D is 68 and 59 respectively.

In many cases, it's difficult to see the contrast in sensor measurements merely by looking through technical specs. The photograph underneath will help give you a stronger sense of the sensor sizes in the D3100 and K20D.

As you can tell, each of the cameras have the same sensor dimensions but not the same MP. You can expect to see the Pentax K20D to provide you with greater detail utilizing its extra 1MP. Greater resolution will help you crop photos a bit more aggressively. The newer D3100 is going to have an advantage in sensor technology.