Pentax K100D vs Sony A7R IV

Below is a complete overview of the Pentax K100D and Sony A7R IV, one being a Entry-Level DSLR and the latter is a Pro Mirrorless by companies Pentax and Sony. There exists a significant gap among the resolutions of the K100D (6MP) and A7R IV (61MP) and the K100D (APS-C) and A7R IV (Full frame) possess different sensor measurements.

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The K100D was introduced 13 years before the A7R IV and that is a fairly sizable gap as far as camera technology is concerned. Both of the cameras come with different body type with the Pentax K100D being a Compact SLR camera and the Sony A7R IV being a SLR-style mirrorless camera.

Before diving through a full comparison, below is a simple highlight of how the K100D grades versus the A7R IV when it comes to portability, imaging, features and an overall grade.

The following is a preview of the gallery photos for Pentax K100D and Sony Alpha A7R IV. The whole galleries are viewable at Pentax K100D Gallery and Sony A7R IV Gallery.

For anybody who is looking to lug around your camera, you should take into account its weight and dimensions. The Pentax K100D enjoys outside measurements of 129mm x 93mm x 70mm (5.1" x 3.7" x 2.8") having a weight of 660 grams (1.46 lbs) whilst the Sony A7R IV has dimensions of 129mm x 96mm x 78mm (5.1" x 3.8" x 3.1") accompanied by a weight of 665 grams (1.47 lbs).

Take a look at the Pentax K100D and Sony A7R IV in the new Camera with Lens Size Comparison Tool.

Always remember, the weight of an Interchangeable Lens Camera will differ based on the lens you have attached at the time. Underneath is the front view sizing comparison of the K100D and the A7R IV.

Considering dimensions and weight, the portability rating of the K100D and A7R IV is 64 and 62 respectively.

More often than not, it is very tough to imagine the difference in sensor measurements just by viewing specifications. The visual underneath will help offer you a stronger sense of the sensor measurements in the K100D and A7R IV.

To sum up, both cameras posses different resolutions and different sensor measurements. The K100D using its smaller sensor is going to make shooting shallow depth of field trickier and the Sony A7R IV will result in more detail using its extra 55MP. Higher resolution can also allow you to crop shots somewhat more aggressively. The older K100D will be behind with regard to sensor tech.