Pentax K-x vs Sony A9

Here, we will be reviewing the Pentax K-x and Sony A9, former being a Entry-Level DSLR while the latter is a Pro Mirrorless by companies Pentax and Sony. There is a substantial difference between the resolutions of the K-x (12MP) and A9 (24MP) and the K-x (APS-C) and A9 (Full frame) posses totally different sensor size.

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The K-x was introduced 8 years earlier than the A9 and that is quite a big difference as far as tech is concerned. The two cameras feature different body design with the Pentax K-x being a Compact SLR camera and the Sony A9 being a SLR-style mirrorless camera.

Before going into a step-by-step comparison, here is a concise introduction of how the K-x matches up against the A9 when considering portability, imaging, features and an overall grade.

The following is a preview of the gallery photos for Pentax K-x & Sony Alpha A9. The whole galleries are viewable at Pentax K-x Gallery & Sony A9 Gallery.

If you are looking to lug around your camera frequently, you need to consider its weight and measurements. The Pentax K-x provides exterior measurements of 123mm x 92mm x 68mm (4.8" x 3.6" x 2.7") accompanied by a weight of 580 grams (1.28 lbs) and the Sony A9 has proportions of 127mm x 96mm x 63mm (5.0" x 3.8" x 2.5") and a weight of 673 grams (1.48 lbs).

See the Pentax K-x and Sony A9 in our brand new Camera plus Lens Size Comparison Tool.

Bear in mind, the weight of an ILC will vary based on the lens you have attached at that moment. Following is a front view over all size comparison of the K-x versus the A9.

Considering size and weight, the portability rating of the K-x and A9 is 69 and 65 respectively.

Usually, it can be difficult to visualise the difference between sensor measurements only by reading technical specs. The graphic here should provide you a clearer sense of the sensor measurements in the K-x and A9.

As you can tell, both the cameras come with different resolutions and different sensor measurements. The K-x using its tinier sensor will make achieving bokeh harder and the Sony A9 will deliver greater detail using its extra 12MP. Higher resolution will help you crop shots a good deal more aggressively. The older K-x is going to be disadvantaged when it comes to sensor innovation.