Olympus TG-820 iHS vs Sony A7R III

In this article, we will be reviewing the Olympus TG-820 iHS and Sony A7R III, former being a Waterproof while the latter is a Pro Mirrorless by manufacturers Olympus and Sony. There exists a large gap among the image resolutions of the TG-820 iHS (12MP) and A7R III (42MP) and the TG-820 iHS (1/2.3") and A7R III (Full frame) possess totally different sensor sizing.

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The TG-820 iHS was launched 6 years earlier than the A7R III and that is a fairly serious difference as far as camera technology is concerned. Both of these cameras offer different body type with the Olympus TG-820 iHS being a Compact camera and the Sony A7R III being a SLR-style mirrorless camera.

Before diving straight into a complete comparison, below is a quick highlight of how the TG-820 iHS scores against the A7R III for portability, imaging, features and an overall rating.

Following is a preview of the gallery images for Olympus TG-820 iHS & Sony Alpha A7R III. The complete galleries are viewable at Olympus TG-820 iHS Gallery & Sony A7R III Gallery.

When you are intending to carry your camera frequently, you'll have to think about its weight and proportions. The Olympus TG-820 iHS has got exterior measurements of 101mm x 65mm x 26mm (4.0" x 2.6" x 1.0") and a weight of 206 grams (0.45 lbs) and the Sony A7R III has measurements of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") with a weight of 657 grams (1.45 lbs).

Analyze the Olympus TG-820 iHS and Sony A7R III in our completely new Camera & Lens Size Comparison Tool.

Remember, the weight of an ILC will differ dependant on the lens you have attached at that moment. Following is the front view proportions comparison of the TG-820 iHS versus the A7R III.

Using dimensions and weight, the portability grade of the TG-820 iHS and A7R III is 92 and 63 respectively.

Normally, it can be tough to envision the difference in sensor sizing merely by looking through technical specs. The visual here should offer you a much better sense of the sensor sizing in the TG-820 iHS and A7R III.

As you can tell, both of these cameras offer different megapixels and different sensor sizing. The TG-820 iHS featuring a smaller sensor will make getting shallower DOF more difficult and the Sony A7R III will render greater detail utilizing its extra 30MP. Higher resolution will allow you to crop pictures a little more aggressively. The older TG-820 iHS will be disadvantaged with regard to sensor technology.