Pentax K100D S vs Sony A55

Here, we are matching up the Pentax K100D S and Sony A55, both Entry-Level DSLR digital cameras by rivals Pentax and Sony. There is a large difference between the sensor resolutions of the K100D S (6MP) and A55 (16MP) but both cameras posses the identical sensor sizes (APS-C).

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The K100D S was introduced 4 years before the A55 and that is quite a serious difference as far as tech is concerned. Each of the cameras feature the same body design (Compact SLR).

Before we go right into a comprehensive comparison, here is a quick synopsis of how the K100D S scores against the A55 for portability, imaging, features and an overall grade.

Following is a sample of the gallery pics for Pentax K100D Super & Sony SLT-A55. The whole galleries are provided at Pentax K100D S Gallery & Sony A55 Gallery.

If you are intending to lug around your camera frequently, you'll need to think about its weight and size. The Pentax K100D S provides physical measurements of 129mm x 91mm x 71mm (5.1" x 3.6" x 2.8") and a weight of 646 grams (1.42 lbs) whilst the Sony A55 has specifications of 124mm x 92mm x 85mm (4.9" x 3.6" x 3.3") having a weight of 500 grams (1.10 lbs).

Look at the Pentax K100D S and Sony A55 in our completely new Camera & Lens Size Comparison Tool.

Take into consideration, the weight of an ILC will vary based on the lens you are using at that moment. Following is a front view scale comparison of the K100D S vs the A55.

Considering size and weight, the portability rating of the K100D S and A55 is 65 and 67 respectively.

Generally, it is difficult to visualise the gap between sensor measurements simply by checking technical specs. The photograph underneath may offer you a far better sense of the sensor measurements in the K100D S and A55.

As you can tell, both of those cameras come with the identical sensor size but not the same megapixels. You can expect to see the Sony A55 to give you extra detail using its extra 10 Megapixels. Greater resolution will also enable you to crop images a good deal more aggressively. The older K100D S is going to be behind with regard to sensor technology.