Pentax K100D vs Sony A33

On this page, we will be matching up the Pentax K100D versus Sony A33, both Entry-Level DSLR cameras by companies Pentax and Sony. There exists a crucial gap among the resolutions of the K100D (6MP) and A33 (14MP) but both cameras have the same sensor sizing (APS-C).

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The K100D was announced 4 years earlier than the A33 and that is a fairly serious gap as far as camera technology is concerned. Each of these cameras have the same body design (Compact SLR).

Before getting straight to a in-depth comparison, here is a simple highlight of how the K100D grades vs the A33 with regard to portability, imaging, features and an overall grade.

Here is a preview of the gallery images for Pentax K100D and Sony SLT-A33. The whole galleries are provided at Pentax K100D Gallery and Sony A33 Gallery.

In case you're looking to lug around your camera regularly, you'll need to consider its weight and volume. The Pentax K100D enjoys exterior dimensions of 129mm x 93mm x 70mm (5.1" x 3.7" x 2.8") and a weight of 660 grams (1.46 lbs) while the Sony A33 has sizing of 124mm x 92mm x 85mm (4.9" x 3.6" x 3.3") accompanied by a weight of 500 grams (1.10 lbs).

Take a look at the Pentax K100D versus Sony A33 in the new Camera with Lens Size Comparison Tool.

Always remember, the weight of an Interchangeable Lens Camera will differ dependant on the lens you are employing at the time. Following is a front view physical size comparison of the K100D versus the A33.

Taking into account dimensions and weight, the portability rating of the K100D and A33 is 64 and 67 respectively.

More often than not, its hard to picture the contrast in sensor measurements simply by checking out a spec sheet. The visual underneath may offer you a better sense of the sensor sizes in the K100D and A33.

Clearly, both of those cameras have the same sensor dimensions albeit different resolution. You should expect the Sony A33 to show greater detail with its extra 8MP. Higher resolution will also make it easier to crop shots a bit more aggressively. The older K100D will be disadvantaged when it comes to sensor tech.