Pentax K100D vs Sony A58

In this write-up, we will be contrasting the Pentax K100D versus Sony A58, both Entry-Level DSLR digital cameras by brands Pentax and Sony. There exists a considerable gap between the resolutions of the K100D (6MP) and A58 (20MP) but they come with the same exact sensor dimensions (APS-C).

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The K100D was introduced 8 years prior to the A58 and that is quite a large difference as far as technology is concerned. Each of these cameras offer the identical body type (Compact SLR).

Before delving in to a step-by-step comparison, below is a simple summary of how the K100D scores against the A58 when considering portability, imaging, features and an overall rating.

Following is a preview of the gallery photos for Pentax K100D & Sony SLT-A58. The whole galleries are provided at Pentax K100D Gallery & Sony A58 Gallery.

In case you're going to carry your camera, you'll need to consider its weight and size. The Pentax K100D has got outer dimensions of 129mm x 93mm x 70mm (5.1" x 3.7" x 2.8") with a weight of 660 grams (1.46 lbs) while the Sony A58 has specifications of 129mm x 95mm x 78mm (5.1" x 3.7" x 3.1") with a weight of 492 grams (1.08 lbs).

Check out the Pentax K100D versus Sony A58 in our completely new Camera & Lens Size Comparison Tool.

Always remember, the weight of an ILC will vary based on the lens you have attached at the time. Below is the front view sizing comparison of the K100D versus the A58.

Taking into consideration dimensions and weight, the portability score of the K100D and A58 is 64 and 68 respectively.

Typically, its difficult to see the difference between sensor sizing merely by checking a spec sheet. The photograph below may give you a far better sense of the sensor sizes in the K100D and A58.

Clearly, both cameras offer the same exact sensor sizing albeit not the same MP. You can count on the Sony A58 to resolve greater detail using its extra 14 Megapixels. Higher resolution will also let you crop shots a little more aggressively. The older K100D is going to be disadvantaged in sensor innovation.