Pentax K100D vs Sony A77

Below, we are looking at the Pentax K100D versus Sony A77, former is a Entry-Level DSLR while the other is a Advanced DSLR by brands Pentax and Sony. There exists a large gap among the sensor resolutions of the K100D (6MP) and A77 (24MP) but they use the exact same sensor dimensions (APS-C).

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The K100D was revealed 5 years earlier than the A77 which is a fairly serious difference as far as camera technology is concerned. Both of the cameras come with different body type with the Pentax K100D being a Compact SLR camera and the Sony A77 being a Mid-size SLR camera.

Before we go straight into a step-by-step comparison, below is a quick overview of how the K100D matches up vs the A77 when it comes to portability, imaging, features and an overall mark.

Here is a sample of the gallery pictures for Pentax K100D & Sony SLT-A77. The full galleries are available at Pentax K100D Gallery & Sony A77 Gallery.

When you are planning to travel with your camera regularly, you need to consider its weight and size. The Pentax K100D comes with external measurements 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 A77 has specifications of 143mm x 104mm x 81mm (5.6" x 4.1" x 3.2") accompanied by a weight of 732 grams (1.61 lbs).

Check out the Pentax K100D versus Sony A77 in our newest Camera & Lens Size Comparison Tool.

Take into consideration, the weight of an ILC will change based on the lens you are working with at that moment. The following is the front view dimension comparison of the K100D versus the A77.

Using dimensions and weight, the portability grade of the K100D and A77 is 64 and 59 respectively.

Sometimes, it's hard to imagine the gap in sensor dimensions only by going through a spec sheet. The image below should offer you a stronger sense of the sensor measurements in the K100D and A77.

As you can see, each of the cameras posses the exact same sensor measurements but different resolution. You can anticipate the Sony A77 to produce greater detail because of its extra 18 Megapixels. Greater resolution can also help you crop images somewhat more aggressively. The more aged K100D will be disadvantaged with regard to sensor innovation.