Pentax K100D vs Sony A330

On this page, we are evaluating the Pentax K100D versus Sony A330, both Entry-Level DSLR digital cameras by brands Pentax and Sony. There is a huge difference between the resolutions of the K100D (6MP) and A330 (10MP) but both cameras posses the same sensor dimensions (APS-C).

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The K100D was released 3 years prior to the A330 and that is quite a significant gap as far as tech is concerned. Each of these cameras have the same body design (Compact SLR).

Before going into a in depth comparison, here is a quick introduction of how the K100D matches up against the A330 with respect to portability, imaging, features and an overall rating.

Here is a sample of the gallery pics for Pentax K100D and Sony Alpha DSLR-A330. The complete galleries are provided at Pentax K100D Gallery and Sony A330 Gallery.

If you are planning to carry your camera, you need to factor in its weight and volume. The Pentax K100D provides outer measurements of 129mm x 93mm x 70mm (5.1" x 3.7" x 2.8") with a weight of 660 grams (1.46 lbs) and the Sony A330 has sizing of 128mm x 97mm x 71mm (5.0" x 3.8" x 2.8") accompanied by a weight of 529 grams (1.17 lbs).

Analyze the Pentax K100D versus Sony A330 in the new Camera and Lens Size Comparison Tool.

Take into consideration, the weight of an Interchangeable Lens Camera will differ depending on the lens you use during that time. Here is a front view scale comparison of the K100D versus the A330.

Looking at size and weight, the portability score of the K100D and A330 is 64 and 67 respectively.

Generally, its difficult to envision the gap between sensor sizing only by reading a spec sheet. The graphic underneath should provide you a more clear sense of the sensor measurements in the K100D and A330.

As you can see, the two cameras provide the same sensor dimensions but not the same resolution. You should expect to see the Sony A330 to offer you greater detail as a result of its extra 4 Megapixels. Greater resolution will make it easier to crop pics more aggressively. The older K100D is going to be behind with regard to sensor tech.