Pentax K-r vs Sony A7R III

Below is a comprehensive assessment of the Pentax K-r vs Sony A7R III, former being a Entry-Level DSLR while the other is a Pro Mirrorless by brands Pentax and Sony. There is a large difference between the image resolutions of the K-r (12MP) and A7R III (42MP) and the K-r (APS-C) and A7R III (Full frame) boast different sensor sizes.

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The K-r was introduced 7 years earlier than the A7R III and that is quite a serious difference as far as tech is concerned. Both cameras feature different body design with the Pentax K-r being a Compact SLR camera and the Sony A7R III being a SLR-style mirrorless camera.

Before going right into a thorough comparison, here is a brief view of how the K-r matches up vs the A7R III with regard to portability, imaging, features and an overall grade.

Here is a sample of the gallery pictures for Pentax K-r & Sony Alpha A7R III. The whole galleries are viewable at Pentax K-r Gallery & Sony A7R III Gallery.

If you're intending to lug around your camera, you will need to consider its weight and measurements. The Pentax K-r has got exterior dimensions of 125mm x 97mm x 68mm (4.9" x 3.8" x 2.7") and a weight of 598 grams (1.32 lbs) and the Sony A7R III has proportions of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") and a weight of 657 grams (1.45 lbs).

See the Pentax K-r vs Sony A7R III in our completely new Camera plus Lens Size Comparison Tool.

Remember that, the weight of an ILC will change dependant on the lens you have chosen at that moment. Below is a front view size comparison of the K-r against the A7R III.

Taking into account size and weight, the portability rating of the K-r and A7R III is 67 and 63 respectively.

Oftentimes, it can be hard to imagine the gap between sensor measurements simply by checking technical specs. The photograph below will provide you a far better sense of the sensor sizes in the K-r and A7R III.

As you have seen, both of those cameras feature different megapixel count and different sensor measurements. The K-r with its tinier sensor is going to make shooting shallower depth of field more difficult and the Sony A7R III will give you more detail using its extra 30MP. Greater resolution will also allow you to crop photos way more aggressively. The older K-r is going to be disadvantaged in sensor tech.