Pentax K-x vs Sony RX100 III

Below, we are evaluating the Pentax K-x versus Sony RX100 III, one is a Entry-Level DSLR and the other is a Large Sensor Compact by rivals Pentax and Sony. There is a huge difference among the resolutions of the K-x (12MP) and RX100 III (20MP) and the K-x (APS-C) and RX100 III (1") come with different sensor size.

Photography Glossary

The K-x was brought out 5 years before the RX100 III which is a fairly significant gap as far as camera tech is concerned. Both of the cameras come with different body type with the Pentax K-x being a Compact SLR camera and the Sony RX100 III being a Large Sensor Compact camera.

Before delving straight into a complete comparison, below is a short view of how the K-x scores against the RX100 III when considering portability, imaging, features and an overall score.

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

In case you're planning to carry around your camera regularly, you will need to consider its weight and measurements. The Pentax K-x provides physical dimensions of 123mm x 92mm x 68mm (4.8" x 3.6" x 2.7") having a weight of 580 grams (1.28 lbs) and the Sony RX100 III has proportions 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 K-x versus Sony RX100 III in the all new Camera and Lens Size Comparison Tool.

Always remember, the weight of an Interchangeable Lens Camera will change based on the lens you have at the time. Following is the front view over all size comparison of the K-x and the RX100 III.

Taking into account size and weight, the portability grade of the K-x and RX100 III is 69 and 89 respectively.

In many cases, it's difficult to visualize the contrast in sensor sizes simply by checking out technical specs. The picture below might give you a better sense of the sensor sizes in the K-x and RX100 III.

As you can tell, both of those cameras posses different megapixel count and different sensor sizes. The K-x due to its larger sensor is going to make shooting shallower depth of field less difficult and the Sony RX100 III will show more detail having its extra 8 Megapixels. Greater resolution will let you crop images somewhat more aggressively. The more aged K-x will be disadvantaged when it comes to sensor technology.