Pentax K100D S vs Sony A7R III

Following is a thorough comparison of the Pentax K100D S vs Sony A7R III, former is a Entry-Level DSLR while the other is a Pro Mirrorless by competitors Pentax and Sony. There is a sizable difference between the image resolutions of the K100D S (6MP) and A7R III (42MP) and the K100D S (APS-C) and A7R III (Full frame) posses totally different sensor size.

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The K100D S was launched 11 years before the A7R III which is quite a significant difference as far as tech is concerned. The two cameras feature different body design with the Pentax K100D S being a Compact SLR camera and the Sony A7R III being a SLR-style mirrorless camera.

Before diving into a in-depth comparison, here is a concise view of how the K100D S matches up versus the A7R III when considering portability, imaging, features and an overall score.

Here is a sample of the gallery pictures for Pentax K100D Super & Sony Alpha A7R III. The complete galleries are provided at Pentax K100D S Gallery & Sony A7R III Gallery.

If you are intending to carry around your camera, you will want to factor in its weight and proportions. The Pentax K100D S offers external dimensions of 129mm x 91mm x 71mm (5.1" x 3.6" x 2.8") with a weight of 646 grams (1.42 lbs) while the Sony A7R III has measurements of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") accompanied by a weight of 657 grams (1.45 lbs).

Take a look at the Pentax K100D S vs Sony A7R III in our newest Camera & Lens Size Comparison Tool.

Take into consideration, the weight of an ILC will vary depending on the lens you are utilising at that moment. Underneath is a front view dimension comparison of the K100D S versus the A7R III.

Factoring in size and weight, the portability rating of the K100D S and A7R III is 65 and 63 respectively.

Usually, its hard to envision the gap between sensor sizes merely by reviewing specs. The pic underneath will give you a much better sense of the sensor sizes in the K100D S and A7R III.

All in all, each of these cameras come with different megapixels and different sensor sizes. The K100D S because of its tinier sensor will make shooting shallower DOF trickier and the Sony A7R III will offer extra detail utilizing its extra 36 Megapixels. Greater resolution will also make it easier to crop photos a good deal more aggressively. The more aged K100D S is going to be behind with regard to sensor tech.