Olympus TG-820 iHS vs Sony A7 III

Here is a thorough assessment of the Olympus TG-820 iHS and Sony A7 III, one being a Waterproof and the other is a Pro Mirrorless by manufacturers Olympus and Sony. There is a sizeable difference between the image resolutions of the TG-820 iHS (12MP) and A7 III (24MP) and the TG-820 iHS (1/2.3") and A7 III (Full frame) feature totally different sensor size.

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The TG-820 iHS was revealed 7 years earlier than the A7 III and that is quite a large gap as far as tech is concerned. Both of the cameras come with different body type with the Olympus TG-820 iHS being a Compact camera and the Sony A7 III being a SLR-style mirrorless camera.

Before delving straight into a full comparison, below is a quick view of how the TG-820 iHS scores versus the A7 III with respect to portability, imaging, features and an overall rating.

Following is a sample of the gallery pictures for Olympus TG-820 iHS and Sony Alpha A7 III. The full galleries are available at Olympus TG-820 iHS Gallery and Sony A7 III Gallery.

When you are going to carry your camera frequently, you should factor in its weight and dimensions. The Olympus TG-820 iHS has got exterior dimensions of 101mm x 65mm x 26mm (4.0" x 2.6" x 1.0") with a weight of 206 grams (0.45 lbs) whilst the Sony A7 III has dimensions of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") along with a weight of 650 grams (1.43 lbs).

Contrast the Olympus TG-820 iHS and Sony A7 III in the latest Camera and Lens Size Comparison Tool.

Take into consideration, the weight of an Interchangeable Lens Camera will differ based on the lens you have attached during that time. Underneath is the front view measurements comparison of the TG-820 iHS and the A7 III.

Factoring in size and weight, the portability grade of the TG-820 iHS and A7 III is 92 and 63 respectively.

Usually, it is very tough to envision the gap between sensor sizing only by reading through technical specs. The graphic here may provide you a greater sense of the sensor dimensions in the TG-820 iHS and A7 III.

As you can tell, the 2 cameras have got different resolutions and different sensor sizing. The TG-820 iHS using its tinier sensor will make getting shallow depth of field trickier and the Sony A7 III will give more detail because of its extra 12 Megapixels. Greater resolution will let you crop photos much more aggressively. The older TG-820 iHS is going to be disadvantaged with regard to sensor technology.