Pentax K100D S vs Sony A7 III

Following is a thorough comparison of the Pentax K100D S and Sony A7 III, former is a Entry-Level DSLR while the latter is a Pro Mirrorless by rivals Pentax and Sony. There is a considerable difference among the sensor resolutions of the K100D S (6MP) and A7 III (24MP) and the K100D S (APS-C) and A7 III (Full frame) use totally different sensor dimensions.

Photography Glossary

The K100D S was brought out 11 years before the A7 III which is a fairly large difference as far as camera tech is concerned. Both cameras come with different body type with the Pentax K100D S being a Compact SLR camera and the Sony A7 III being a SLR-style mirrorless camera.

Before we go through a more detailed comparison, below is a concise introduction of how the K100D S matches up vs the A7 III in the way of portability, imaging, features and an overall score.

Following is a preview of the gallery images for Pentax K100D Super & Sony Alpha A7 III. The entire galleries are viewable at Pentax K100D S Gallery & Sony A7 III Gallery.

For anyone who is aiming to carry around your camera frequently, you will want to consider its weight and volume. The Pentax K100D S has got outside dimensions of 129mm x 91mm x 71mm (5.1" x 3.6" x 2.8") accompanied by a weight of 646 grams (1.42 lbs) while the Sony A7 III has sizing of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") having a weight of 650 grams (1.43 lbs).

Examine the Pentax K100D S and Sony A7 III in our newest Camera plus Lens Size Comparison Tool.

Take into account, the weight of an ILC will change dependant on the lens you are utilizing at that moment. Following is the front view over all size comparison of the K100D S and the A7 III.

Using size and weight, the portability rating of the K100D S and A7 III is 65 and 63 respectively.

In many cases, it can be tough to see the gap in sensor sizes just by researching a spec sheet. The pic here will help provide you a stronger sense of the sensor dimensions in the K100D S and A7 III.

Clearly, each of the cameras posses different megapixels and different sensor sizes. The K100D S due to its smaller sensor will make shooting shallower DOF trickier and the Sony A7 III will provide you with extra detail having its extra 18 Megapixels. Higher resolution can also enable you to crop shots somewhat more aggressively. The more aged K100D S will be behind with regard to sensor innovation.