Nikon D5100 vs Pentax K100D S

Following is a comprehensive analysis of the Nikon D5100 versus Pentax K100D S, both Entry-Level DSLR cameras by rivals Nikon and Pentax. There is a large difference among the resolutions of the D5100 (16MP) and K100D S (6MP) but both cameras have the same sensor size (APS-C).

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The D5100 was brought out 3 years after the K100D S which is a fairly serious difference as far as camera tech is concerned. Both of the cameras have the same body design (Compact SLR).

Before we go right into a more detailed comparison, here is a short summary of how the D5100 matches up against the K100D S in terms of portability, imaging, features and an overall score.

Below is a sample of the gallery pictures for Nikon D5100 & Pentax K100D Super. The entire galleries are viewable at Nikon D5100 Gallery & Pentax K100D S Gallery.

For anyone who is looking to carry around your camera, you will need to think about its weight and size. The Nikon D5100 features physical measurements of 128mm x 97mm x 79mm (5.0" x 3.8" x 3.1") along with a weight of 560 grams (1.23 lbs) while the Pentax K100D S has specifications of 129mm x 91mm x 71mm (5.1" x 3.6" x 2.8") with a weight of 646 grams (1.42 lbs).

Contrast the Nikon D5100 versus Pentax K100D S in our completely new Camera plus Lens Size Comparison Tool.

Keep in mind, the weight of an ILC will differ dependant on the lens you are utilizing at that time. Here is a front view dimension comparison of the D5100 against the K100D S.

Using size and weight, the portability grade of the D5100 and K100D S is 66 and 65 respectively.

Usually, it's difficult to visualize the gap in sensor sizes simply by seeing technical specs. The picture below will help give you a greater sense of the sensor sizing in the D5100 and K100D S.

As you have seen, the 2 cameras have the same sensor dimensions but different resolution. You can anticipate the Nikon D5100 to provide extra detail having its extra 10MP. Greater resolution will let you crop pics a bit more aggressively. The fresher D5100 provides an advantage when it comes to sensor innovation.