Pentax K100D vs Sony RX100 III

Below, we are evaluating the Pentax K100D versus Sony RX100 III, one is a Entry-Level DSLR and the other is a Large Sensor Compact by brands Pentax and Sony. There exists a big gap among the sensor resolutions of the K100D (6MP) and RX100 III (20MP) and the K100D (APS-C) and RX100 III (1") come with different sensor size.

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The K100D was unveiled 8 years before the RX100 III which is a fairly big gap 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 RX100 III being a Large Sensor Compact camera.

Before we go in to a more detailed comparison, below is a concise synopsis of how the K100D matches up vs the RX100 III in the way of portability, imaging, features and an overall mark.

This is a sample of the gallery pictures for Pentax K100D and Sony Cyber-shot DSC-RX100 III. The full galleries are provided at Pentax K100D Gallery and Sony RX100 III Gallery.

In case you're looking to travel with your camera, you'll need to consider its weight and proportions. The Pentax K100D has got outside dimensions of 129mm x 93mm x 70mm (5.1" x 3.7" x 2.8") having a weight of 660 grams (1.46 lbs) and the Sony RX100 III has measurements of 102mm x 58mm x 41mm (4.0" x 2.3" x 1.6") with a weight of 290 grams (0.64 lbs).

Compare the Pentax K100D versus Sony RX100 III in the latest Camera and Lens Size Comparison Tool.

Do not forget, the weight of an Interchangeable Lens Camera will vary based on the lens you are utilizing at that moment. Here is the front view measurements comparison of the K100D vs the RX100 III.

Factoring in dimensions and weight, the portability grade of the K100D and RX100 III is 64 and 89 respectively.

More often than not, it's difficult to visualize the gap in sensor dimensions merely by researching a spec sheet. The image below will provide you a far better sense of the sensor sizes in the K100D and RX100 III.

Clearly, both of those cameras have got different megapixel count and different sensor dimensions. The K100D using its larger sensor is going to make achieving shallower DOF less difficult and the Sony RX100 III will provide you with extra detail having an extra 14MP. Greater resolution can also help you crop photos much more aggressively. The more aged K100D will be behind when it comes to sensor tech.