Pentax K100D vs Sony A9

Below is a thorough assessment of the Pentax K100D and Sony A9, one being a Entry-Level DSLR and the latter is a Pro Mirrorless by competitors Pentax and Sony. There exists a significant gap between the resolutions of the K100D (6MP) and A9 (24MP) and the K100D (APS-C) and A9 (Full frame) feature totally different sensor dimensions.

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The K100D was brought out 11 years before the A9 and that is quite a sizable gap as far as technology is concerned. Each of the cameras offer different body type with the Pentax K100D being a Compact SLR camera and the Sony A9 being a SLR-style mirrorless camera.

Before delving in to a more detailed comparison, below is a simple highlight of how the K100D matches up versus the A9 in the way of portability, imaging, features and an overall grade.

This is a preview of the gallery photos for Pentax K100D and Sony Alpha A9. The entire galleries are available at Pentax K100D Gallery and Sony A9 Gallery.

For those who are intending to lug around your camera, you are going to need to consider its weight and measurements. The Pentax K100D enjoys exterior dimensions of 129mm x 93mm x 70mm (5.1" x 3.7" x 2.8") and a weight of 660 grams (1.46 lbs) and the Sony A9 has proportions of 127mm x 96mm x 63mm (5.0" x 3.8" x 2.5") having a weight of 673 grams (1.48 lbs).

Examine the Pentax K100D and Sony A9 in the all new Camera with Lens Size Comparison Tool.

Take into account, the weight of an Interchangeable Lens Camera will change based on the lens you use at that moment. The following is the front view overall size comparison of the K100D vs the A9.

Considering dimensions and weight, the portability grade of the K100D and A9 is 64 and 65 respectively.

Sometimes, it's hard to see the difference between sensor measurements simply by going over a spec sheet. The photograph below might offer you a far better sense of the sensor sizes in the K100D and A9.

Clearly, the 2 cameras offer different resolutions and different sensor measurements. The K100D because of its tinier sensor will make getting bokeh tougher and the Sony A9 will offer more detail having its extra 18 Megapixels. Higher resolution will enable you to crop shots a little more aggressively. The older K100D is going to be disadvantaged with regard to sensor tech.