Olympus TG-3 vs Sony A7 III

On this page, we will be analyzing the Olympus TG-3 and Sony A7 III, one being a Waterproof and the latter is a Pro Mirrorless by brands Olympus and Sony. There is a significant difference among the resolutions of the TG-3 (16MP) and A7 III (24MP) and the TG-3 (1/2.3") and A7 III (Full frame) provide totally different sensor measurements.

Photography Glossary

The TG-3 was manufactured 4 years earlier than the A7 III and that is a fairly sizable gap as far as camera tech is concerned. The two cameras have different body design with the Olympus TG-3 being a Compact camera and the Sony A7 III being a SLR-style mirrorless camera.

Before diving right into a complete comparison, here is a short highlight of how the TG-3 scores versus the A7 III in regards to portability, imaging, features and an overall rating.

Below is a preview of the gallery images for Olympus Tough TG-3 and Sony Alpha A7 III. The entire galleries are viewable at Olympus TG-3 Gallery and Sony A7 III Gallery.

In case you're planning to carry your camera regularly, you will have to factor in its weight and dimensions. The Olympus TG-3 offers outside measurements of 112mm x 66mm x 31mm (4.4" x 2.6" x 1.2") with a weight of 247 grams (0.54 lbs) whilst the Sony A7 III has dimensions of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") accompanied by a weight of 650 grams (1.43 lbs).

Contrast the Olympus TG-3 and Sony A7 III in the new Camera and Lens Size Comparison Tool.

Take into consideration, the weight of an Interchangeable Lens Camera will vary dependant on the lens you have at that time. Following is a front view physical size comparison of the TG-3 versus the A7 III.

Using size and weight, the portability score of the TG-3 and A7 III is 90 and 63 respectively.

Oftentimes, it is very hard to see the contrast in sensor sizing purely by going through a spec sheet. The visual here will provide you a more clear sense of the sensor sizing in the TG-3 and A7 III.

As you can see, both cameras have different megapixels and different sensor sizing. The TG-3 featuring a smaller sensor will make getting shallower depth of field more challenging and the Sony A7 III will show greater detail due to its extra 8MP. Higher resolution will enable you to crop shots a bit more aggressively. The older TG-3 will be behind in sensor tech.