Olympus TG-810 vs Sony A7R III

Below, we are reviewing the Olympus TG-810 and Sony A7R III, one being a Waterproof and the other is a Pro Mirrorless by competitors Olympus and Sony. There is a sizeable difference among the image resolutions of the TG-810 (14MP) and A7R III (42MP) and the TG-810 (1/2.3") and A7R III (Full frame) enjoy different sensor sizing.

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The TG-810 was revealed 7 years earlier than the A7R III and that is a fairly large gap as far as camera tech is concerned. Both of these cameras come with different body type with the Olympus TG-810 being a Compact camera and the Sony A7R III being a SLR-style mirrorless camera.

Before going in to a detailed comparison, below is a short introduction of how the TG-810 scores against the A7R III with respect to portability, imaging, features and an overall grade.

Below is a sample of the gallery pictures for Olympus TG-810 and Sony Alpha A7R III. The full galleries are provided at Olympus TG-810 Gallery and Sony A7R III Gallery.

If you're planning to lug around your camera, you are going to need to consider its weight and dimensions. The Olympus TG-810 enjoys outside measurements of 100mm x 65mm x 26mm (3.9" x 2.6" x 1.0") with a weight of 215 grams (0.47 lbs) whilst 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).

Contrast the Olympus TG-810 and Sony A7R III in the all new Camera and Lens Size Comparison Tool.

Remember that, the weight of an Interchangeable Lens Camera will differ based on the lens you select at that time. Following is the front view dimensions comparison of the TG-810 and the A7R III.

Taking into account size and weight, the portability grade of the TG-810 and A7R III is 92 and 63 respectively.

Generally, it can be difficult to imagine the gap in sensor measurements only by researching specs. The graphic underneath might offer you a greater sense of the sensor measurements in the TG-810 and A7R III.

As you can plainly see, the two cameras posses different resolutions and different sensor measurements. The TG-810 having a smaller sensor is going to make achieving shallower DOF tougher and the Sony A7R III will render greater detail because of its extra 28 Megapixels. Greater resolution will enable you to crop images somewhat more aggressively. The older TG-810 will be behind with regard to sensor tech.