Pentax K20D vs Sony RX100 III

Here, we are comparing the Pentax K20D and Sony RX100 III, one being a Advanced DSLR and the other is a Large Sensor Compact by companies Pentax and Sony. There exists a huge gap among the image resolutions of the K20D (15MP) and RX100 III (20MP) and the K20D (APS-C) and RX100 III (1") provide different sensor size.

Photography Glossary

The K20D was revealed 6 years before the RX100 III and that is a fairly significant gap as far as camera technology is concerned. Both cameras feature different body design with the Pentax K20D being a Mid-size SLR camera and the Sony RX100 III being a Large Sensor Compact camera.

Before delving straight to a comprehensive comparison, here is a concise summation of how the K20D scores against the RX100 III with regard to portability, imaging, features and an overall grade.

Here is a sample of the gallery pics for Pentax K20D and Sony Cyber-shot DSC-RX100 III. The full galleries are available at Pentax K20D Gallery and Sony RX100 III Gallery.

When you are looking to lug around your camera regularly, you will have to factor its weight and proportions. The Pentax K20D provides exterior dimensions of 142mm x 101mm x 70mm (5.6" x 4.0" x 2.8") with a weight of 800 grams (1.76 lbs) while the Sony RX100 III has measurements of 102mm x 58mm x 41mm (4.0" x 2.3" x 1.6") having a weight of 290 grams (0.64 lbs).

Look at the Pentax K20D and Sony RX100 III in the new Camera with Lens Size Comparison Tool.

Keep in mind, the weight of an Interchangeable Lens Camera will vary based on the lens you are utilising at that moment. Following is a front view over all size comparison of the K20D and the RX100 III.

Considering dimensions and weight, the portability grade of the K20D and RX100 III is 59 and 89 respectively.

Sometimes, it can be tough to visualize the gap in sensor measurements only by going through technical specs. The visual underneath will offer you a more clear sense of the sensor sizes in the K20D and RX100 III.

As you can tell, both of those cameras come with different resolutions and different sensor measurements. The K20D using its larger sensor is going to make achieving bokeh less difficult and the Sony RX100 III will provide extra detail because of its extra 5 Megapixels. Greater resolution will also enable you to crop images a good deal more aggressively. The older K20D will be disadvantaged in sensor tech.