Olympus TG-860 vs Sony A7R III

Here is a complete comparison of the Olympus TG-860 versus Sony A7R III, one being a Waterproof and the latter is a Pro Mirrorless by brands Olympus and Sony. There is a sizeable difference between the sensor resolutions of the TG-860 (16MP) and A7R III (42MP) and the TG-860 (1/2.3") and A7R III (Full frame) offer different sensor measurements.

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The TG-860 was revealed 3 years prior to the A7R III and that is quite a large gap as far as tech is concerned. Both the cameras have different body design with the Olympus TG-860 being a Ultracompact camera and the Sony A7R III being a SLR-style mirrorless camera.

Before getting straight to a full comparison, here is a quick highlight of how the TG-860 grades against the A7R III with regards to portability, imaging, features and an overall rating.

The following is a preview of the gallery photos for Olympus Stylus Tough TG-860 and Sony Alpha A7R III. The full galleries are provided at Olympus TG-860 Gallery and Sony A7R III Gallery.

If you're looking to carry your camera often, you need to take into account its weight and size. The Olympus TG-860 has got outer dimensions of 110mm x 64mm x 28mm (4.3" x 2.5" x 1.1") with a weight of 224 grams (0.49 lbs) while the Sony A7R III has specifications of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") along with a weight of 657 grams (1.45 lbs).

Check the Olympus TG-860 versus Sony A7R III in the all new Camera and Lens Size Comparison Tool.

Do not forget, the weight of an Interchangeable Lens Camera will differ depending on the lens you are working with at that time. Following is a front view overall size comparison of the TG-860 and the A7R III.

Looking at size and weight, the portability score of the TG-860 and A7R III is 91 and 63 respectively.

Often, it can be hard to visualize the gap between sensor sizing only by reading through specs. The graphic here may give you a far better sense of the sensor dimensions in the TG-860 and A7R III.

As you can plainly see, both of these cameras have different megapixel count and different sensor sizing. The TG-860 using its tinier sensor is going to make achieving shallower depth of field harder and the Sony A7R III will give you greater detail because of its extra 26MP. Higher resolution can also allow you to crop shots a bit more aggressively. The older TG-860 is going to be disadvantaged with regard to sensor innovation.