Pentax K-S2 vs Sony A9

On this page, we are comparing the Pentax K-S2 vs Sony A9, former is a Entry-Level DSLR while the other is a Pro Mirrorless by brands Pentax and Sony. The sensor resolution of the K-S2 (20MP) and the A9 (24MP) is very similar but the K-S2 (APS-C) and A9 (Full frame) boast different sensor sizing.

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The K-S2 was manufactured 3 years prior to the A9 which is quite a significant difference as far as technology is concerned. Both of the cameras have different body design with the Pentax K-S2 being a Compact SLR camera and the Sony A9 being a SLR-style mirrorless camera.

Before delving right into a step-by-step comparison, here is a simple synopsis of how the K-S2 grades versus the A9 in terms of portability, imaging, features and an overall score.

This is a sample of the gallery pics for Pentax K-S2 & Sony Alpha A9. The entire galleries are provided at Pentax K-S2 Gallery & Sony A9 Gallery.

If you are intending to carry around your camera, you'll have to factor its weight and size. The Pentax K-S2 enjoys physical dimensions of 123mm x 91mm x 73mm (4.8" x 3.6" x 2.9") with a weight of 678 grams (1.49 lbs) whilst the Sony A9 has specifications of 127mm x 96mm x 63mm (5.0" x 3.8" x 2.5") with a weight of 673 grams (1.48 lbs).

Look at the Pentax K-S2 vs Sony A9 in our completely new Camera & Lens Size Comparison Tool.

Bear in mind, the weight of an ILC will differ based on the lens you are utilising at that time. Following is a front view dimension comparison of the K-S2 versus the A9.

Using dimensions and weight, the portability score of the K-S2 and A9 is 64 and 65 respectively.

Normally, it is hard to imagine the difference between sensor sizes merely by reviewing a spec sheet. The image below will provide you a more clear sense of the sensor dimensions in the K-S2 and A9.

As you can see, each of these cameras provide different megapixels and different sensor sizes. The K-S2 because of its tinier sensor is going to make achieving shallower depth of field trickier and the Sony A9 will offer you more detail due to its extra 4 Megapixels. Greater resolution will also let you crop images more aggressively. The more aged K-S2 is going to be disadvantaged when it comes to sensor technology.