Pentax WG-3 vs Sony A7R III

The following is a extended overview of the Pentax WG-3 vs Sony A7R III, former is a Waterproof while the other is a Pro Mirrorless by brands Pentax and Sony. There is a substantial difference among the image resolutions of the WG-3 (16MP) and A7R III (42MP) and the WG-3 (1/2.3") and A7R III (Full frame) have totally different sensor dimensions.

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The WG-3 was revealed 5 years prior to the A7R III which is a fairly big difference as far as camera tech is concerned. Each of the cameras feature different body design with the Pentax WG-3 being a Compact camera and the Sony A7R III being a SLR-style mirrorless camera.

Before going into a more detailed comparison, here is a simple introduction of how the WG-3 scores versus the A7R III when considering portability, imaging, features and an overall mark.

Here is a sample of the gallery pics for Pentax WG-3 & Sony Alpha A7R III. The full galleries are provided at Pentax WG-3 Gallery & Sony A7R III Gallery.

If you are going to travel with your camera regularly, you need to factor in its weight and dimensions. The Pentax WG-3 enjoys external dimensions of 124mm x 64mm x 33mm (4.9" x 2.5" x 1.3") and a weight of 230 grams (0.51 lbs) while the Sony A7R III has dimensions of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") accompanied by a weight of 657 grams (1.45 lbs).

Analyze the Pentax WG-3 vs Sony A7R III in our completely new Camera plus Lens Size Comparison Tool.

Remember that, the weight of an ILC will differ based on the lens you are using at the time. The following is a front view dimensions comparison of the WG-3 versus the A7R III.

Taking into consideration size and weight, the portability score of the WG-3 and A7R III is 90 and 63 respectively.

Generally, it is hard to see the gap in sensor dimensions only by checking out specs. The pic below will help provide you a greater sense of the sensor sizes in the WG-3 and A7R III.

All in all, both the cameras feature different megapixel count and different sensor dimensions. The WG-3 using its smaller sensor will make shooting shallow depth of field more difficult and the Sony A7R III will provide more detail because of its extra 26MP. Greater resolution will make it easier to crop images way more aggressively. The more aged WG-3 will be disadvantaged with regard to sensor technology.