Pentax K-S1 vs Sony A9 II

Lets examine more closely at the Pentax K-S1 versus Sony A9 II, one being a Advanced DSLR and the other is a Pro Mirrorless by brands Pentax and Sony. The sensor resolution of the K-S1 (20MP) and the A9 II (24MP) is very well matched but the K-S1 (APS-C) and A9 II (Full frame) use totally different sensor sizing.

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The K-S1 was announced 6 years before the A9 II and that is quite a serious gap as far as technology is concerned. Each of the cameras come with different body type with the Pentax K-S1 being a Mid-size SLR camera and the Sony A9 II being a SLR-style mirrorless camera.

Before going straight into a full comparison, below is a short view of how the K-S1 matches up against the A9 II with regards to portability, imaging, features and an overall rating.

Following is a sample of the gallery pics for Pentax K-S1 and Sony Alpha A9 Mark II. The whole galleries are viewable at Pentax K-S1 Gallery and Sony A9 II Gallery.

For those who are looking to carry your camera often, you are going to need to consider its weight and size. The Pentax K-S1 provides physical measurements of 121mm x 93mm x 70mm (4.8" x 3.7" x 2.8") accompanied by a weight of 558 grams (1.23 lbs) whilst the Sony A9 II has specifications of 129mm x 96mm x 76mm (5.1" x 3.8" x 3.0") accompanied by a weight of 678 grams (1.49 lbs).

Check the Pentax K-S1 versus Sony A9 II in the latest Camera with Lens Size Comparison Tool.

Keep in mind, the weight of an Interchangeable Lens Camera will differ depending on the lens you are using during that time. Underneath is the front view measurement comparison of the K-S1 compared to the A9 II.

Taking into account dimensions and weight, the portability rating of the K-S1 and A9 II is 69 and 62 respectively.

Normally, it is hard to see the difference between sensor sizing only by checking specs. The graphic below might provide you a better sense of the sensor sizing in the K-S1 and A9 II.

All in all, both of those cameras posses different resolutions and different sensor sizing. The K-S1 with its tinier sensor will make achieving bokeh more challenging and the Sony A9 II will resolve greater detail with its extra 4MP. Greater resolution can also make it easier to crop images somewhat more aggressively. The older K-S1 is going to be disadvantaged when it comes to sensor tech.