Pentax K100D S vs Sony RX100 III

On this page, we will be looking at the Pentax K100D S vs Sony RX100 III, former being a Entry-Level DSLR while the latter is a Large Sensor Compact by companies Pentax and Sony. There exists a sizable gap between the image resolutions of the K100D S (6MP) and RX100 III (20MP) and the K100D S (APS-C) and RX100 III (1") provide different sensor dimensions.

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The K100D S was released 7 years earlier than the RX100 III and that is quite a significant difference as far as technology is concerned. Each of the cameras have different body design with the Pentax K100D S being a Compact SLR camera and the Sony RX100 III being a Large Sensor Compact camera.

Before getting straight to a more detailed comparison, here is a concise summary of how the K100D S grades versus the RX100 III in terms of portability, imaging, features and an overall grade.

Below is a preview of the gallery photos for Pentax K100D Super & Sony Cyber-shot DSC-RX100 III. The complete galleries are viewable at Pentax K100D S Gallery & Sony RX100 III Gallery.

For anyone who is intending to lug around your camera frequently, you have to factor in its weight and dimensions. The Pentax K100D S enjoys external measurements of 129mm x 91mm x 71mm (5.1" x 3.6" x 2.8") having a weight of 646 grams (1.42 lbs) and the Sony RX100 III has dimensions of 102mm x 58mm x 41mm (4.0" x 2.3" x 1.6") having a weight of 290 grams (0.64 lbs).

Examine the Pentax K100D S vs Sony RX100 III in our completely new Camera plus Lens Size Comparison Tool.

Do not forget, the weight of an ILC will vary depending on the lens you have at that time. Underneath is a front view measurement comparison of the K100D S versus the RX100 III.

Taking into consideration dimensions and weight, the portability rating of the K100D S and RX100 III is 65 and 89 respectively.

More often than not, its hard to visualize the contrast between sensor measurements purely by reading through a spec sheet. The visual here may provide you a stronger sense of the sensor sizing in the K100D S and RX100 III.

As you can see, both of those cameras have different megapixel count and different sensor measurements. The K100D S because of its bigger sensor is going to make getting shallower DOF easier and the Sony RX100 III will resolve greater detail as a result of its extra 14 Megapixels. Higher resolution can also allow you to crop photographs a bit more aggressively. The older K100D S is going to be disadvantaged when it comes to sensor technology.