Pentax K100D vs Sony RX100

Following is a in-depth comparison of the Pentax K100D and Sony RX100, one is a Entry-Level DSLR and the other is a Large Sensor Compact by competitors Pentax and Sony. There is a crucial difference among the image resolutions of the K100D (6MP) and RX100 (20MP) and the K100D (APS-C) and RX100 (1") posses totally different sensor sizing.

Meta to Introduce 'AI-Generated' Labels for Media starting next month

The K100D was brought out 6 years prior to the RX100 which is a fairly serious gap as far as camera tech is concerned. Each of the cameras have different body design with the Pentax K100D being a Compact SLR camera and the Sony RX100 being a Large Sensor Compact camera.

Before we go right into a complete comparison, here is a short summary of how the K100D matches up vs the RX100 with respect to portability, imaging, features and an overall score.

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

In case you're looking to carry around your camera, you need to take into account its weight and size. The Pentax K100D offers external dimensions of 129mm x 93mm x 70mm (5.1" x 3.7" x 2.8") accompanied by a weight of 660 grams (1.46 lbs) while the Sony RX100 has specifications of 102mm x 58mm x 36mm (4.0" x 2.3" x 1.4") and a weight of 240 grams (0.53 lbs).

Examine the Pentax K100D and Sony RX100 in the latest Camera and Lens Size Comparison Tool.

Take into consideration, the weight of an Interchangeable Lens Camera will differ depending on the lens you are utilizing at that time. Below is a front view dimension comparison of the K100D compared to the RX100.

Looking at size and weight, the portability score of the K100D and RX100 is 64 and 91 respectively.

Oftentimes, it's difficult to see the difference in sensor sizes merely by looking through technical specs. The image here should provide you a stronger sense of the sensor dimensions in the K100D and RX100.

As you have seen, each of the cameras have different megapixel count and different sensor sizes. The K100D due to its larger sensor will make achieving shallower DOF simpler and the Sony RX100 will render more detail having its extra 14 Megapixels. Greater resolution can also let you crop images a bit more aggressively. The more aged K100D will be disadvantaged when it comes to sensor tech.