Pentax WG-3 GPS vs Sony A7R III

Below is a in depth comparison of the Pentax WG-3 GPS and Sony A7R III, former being a Waterproof while the latter is a Pro Mirrorless by manufacturers Pentax and Sony. There is a sizable difference between the sensor resolutions of the WG-3 GPS (16MP) and A7R III (42MP) and the WG-3 GPS (1/2.3") and A7R III (Full frame) provide totally different sensor sizing.

Photography Glossary

The WG-3 GPS was announced 5 years prior to the A7R III and that is quite a significant difference as far as tech is concerned. The two cameras have different body design with the Pentax WG-3 GPS being a Compact camera and the Sony A7R III being a SLR-style mirrorless camera.

Before delving right into a in-depth comparison, here is a simple summation of how the WG-3 GPS scores vs the A7R III when it comes to portability, imaging, features and an overall grade.

Following is a preview of the gallery photos for Pentax WG-3 GPS & Sony Alpha A7R III. The whole galleries are available at Pentax WG-3 GPS Gallery & Sony A7R III Gallery.

If you are planning to lug around your camera frequently, you need to consider its weight and size. The Pentax WG-3 GPS has external measurements of 125mm x 64mm x 33mm (4.9" x 2.5" x 1.3") having a weight of 238 grams (0.52 lbs) and the Sony A7R III has specifications of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") along with a weight of 657 grams (1.45 lbs).

Check out the Pentax WG-3 GPS and Sony A7R III in our completely new Camera plus Lens Size Comparison Tool.

Keep in mind, the weight of an ILC will differ depending on the lens you are working with at the time. Below is a front view dimensions comparison of the WG-3 GPS vs the A7R III.

Taking into account size and weight, the portability grade of the WG-3 GPS and A7R III is 90 and 63 respectively.

In many cases, it is very tough to see the contrast between sensor measurements just by going over specifications. The photograph below will offer you a much better sense of the sensor sizing in the WG-3 GPS and A7R III.

Plainly, the two cameras provide different resolutions and different sensor measurements. The WG-3 GPS having a tinier sensor will make getting shallower depth of field tougher and the Sony A7R III will offer you greater detail with its extra 26 Megapixels. Higher resolution will let you crop pictures more aggressively. The older WG-3 GPS is going to be disadvantaged in sensor technology.