Olympus TG-870 vs Sony A7 III

Below is a complete review of the Olympus TG-870 versus Sony A7 III, one being a Ultracompact and the latter is a Pro Mirrorless by competitors Olympus and Sony. There exists a sizeable gap among the resolutions of the TG-870 (16MP) and A7 III (24MP) and the TG-870 (1/2.3") and A7 III (Full frame) use different sensor sizing.

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The TG-870 was revealed 3 years before the A7 III and that is a fairly large gap as far as camera technology is concerned. The two cameras offer different body type with the Olympus TG-870 being a Ultracompact camera and the Sony A7 III being a SLR-style mirrorless camera.

Before diving straight into a detailed comparison, below is a brief view of how the TG-870 scores against the A7 III in terms of portability, imaging, features and an overall grade.

Below is a preview of the gallery photos for Olympus Stylus Tough TG-870 and Sony Alpha A7 III. The full galleries are available at Olympus TG-870 Gallery and Sony A7 III Gallery.

If you're looking to lug around your camera, you're going to have to factor its weight and size. The Olympus TG-870 has physical measurements of 113mm x 64mm x 28mm (4.4" x 2.5" x 1.1") along with a weight of 221 grams (0.49 lbs) while the Sony A7 III has specifications of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") and a weight of 650 grams (1.43 lbs).

Examine the Olympus TG-870 versus Sony A7 III in the all new Camera and Lens Size Comparison Tool.

Keep in mind, the weight of an Interchangeable Lens Camera will differ dependant on the lens you have attached at that time. The following is the front view sizing comparison of the TG-870 versus the A7 III.

Using dimensions and weight, the portability score of the TG-870 and A7 III is 91 and 63 respectively.

Normally, its hard to picture the gap in sensor measurements merely by going through specs. The photograph here might offer you a better sense of the sensor measurements in the TG-870 and A7 III.

As you can plainly see, both the cameras enjoy different megapixel count and different sensor measurements. The TG-870 using its smaller sensor is going to make shooting shallow depth of field harder and the Sony A7 III will produce greater detail because of its extra 8MP. Higher resolution will enable you to crop photographs far more aggressively. The older TG-870 will be disadvantaged in sensor technology.