Pentax K100D vs Sony A100

In this write-up, we are contrasting the Pentax K100D versus Sony A100, both Entry-Level DSLR digital cameras by brands Pentax and Sony. There exists a considerable gap between the image resolutions of the K100D (6MP) and A100 (10MP) but they use the same exact sensor size (APS-C).

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The K100D was unveiled 5 months later than the A100 and they are both of a similar age. Both cameras offer the identical body type (Compact SLR).

Before we go through a in-depth comparison, below is a concise highlight of how the K100D matches up versus the A100 in terms of portability, imaging, features and an overall rating.

Here is a sample of the gallery pictures for Pentax K100D & Sony Alpha DSLR-A100. The full galleries are viewable at Pentax K100D Gallery & Sony A100 Gallery.

If you are going to carry your camera frequently, you have to take into account its weight and proportions. The Pentax K100D offers external dimensions of 129mm x 93mm x 70mm (5.1" x 3.7" x 2.8") and a weight of 660 grams (1.46 lbs) whilst the Sony A100 has measurements of 133mm x 95mm x 71mm (5.2" x 3.7" x 2.8") with a weight of 638 grams (1.41 lbs).

Compare the Pentax K100D versus Sony A100 in our completely new Camera & Lens Size Comparison Tool.

Bear in mind, the weight of an ILC will change depending on the lens you have at that time. Following is the front view measurement comparison of the K100D versus the A100.

Taking into account dimensions and weight, the portability rating of the K100D and A100 is 64 and 64 respectively.

Normally, it is very hard to imagine the contrast between sensor sizing just by reading through technical specs. The photograph below will help offer you a clearer sense of the sensor sizes in the K100D and A100.

As you have seen, both the cameras enjoy the same exact sensor sizing but different resolution. You can anticipate the Sony A100 to give you greater detail having an extra 4 Megapixels. Greater resolution will also allow you to crop images far more aggressively.