Pentax K100D S vs Pentax K20D

Here is a detailed review of the Pentax K100D S vs Pentax K20D, one being a Entry-Level DSLR and the latter is a Advanced DSLR and both of them are created by Pentax. There exists a sizeable gap among the resolutions of the K100D S (6MP) and K20D (15MP) but they feature the same exact sensor dimensions (APS-C).

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The K100D S was revealed 12 months prior to the K20D which means that they are both of a similar generation. Each of the cameras offer different body type with the Pentax K100D S being a Compact SLR camera and the Pentax K20D being a Mid-size SLR camera.

Before getting straight into a complete comparison, below is a short introduction of how the K100D S grades against the K20D with regards to portability, imaging, features and an overall rating.

Below is a preview of the gallery images for Pentax K100D Super and Pentax K20D. The full galleries are provided at Pentax K100D S Gallery and Pentax K20D Gallery.

When you are intending to carry your camera often, you will have to factor its weight and proportions. The Pentax K100D S features external dimensions of 129mm x 91mm x 71mm (5.1" x 3.6" x 2.8") having a weight of 646 grams (1.42 lbs) and the Pentax K20D has measurements of 142mm x 101mm x 70mm (5.6" x 4.0" x 2.8") along with a weight of 800 grams (1.76 lbs).

Contrast the Pentax K100D S vs Pentax K20D in the all new Camera with Lens Size Comparison Tool.

Bear in mind, the weight of an Interchangeable Lens Camera will vary based on the lens you are employing during that time. Here is the front view dimension comparison of the K100D S against the K20D.

Looking at dimensions and weight, the portability rating of the K100D S and K20D is 65 and 59 respectively.

Normally, its hard to visualize the gap in sensor sizing purely by researching a spec sheet. The visual below will help offer you a more clear sense of the sensor dimensions in the K100D S and K20D.

As you can see, both the cameras enjoy the same exact sensor sizing albeit different megapixels. You should expect the Pentax K20D to result in more detail because of its extra 9 Megapixels. Higher resolution can also let you crop photographs far more aggressively. The older K100D S will be disadvantaged when it comes to sensor technology.