Olympus TG-870 vs Sony A7R III

Lets examine more in depth at the Olympus TG-870 versus Sony A7R III, former is a Ultracompact while the other is a Pro Mirrorless by competitors Olympus and Sony. There exists a sizable gap among the sensor resolutions of the TG-870 (16MP) and A7R III (42MP) and the TG-870 (1/2.3") and A7R III (Full frame) come with different sensor size.

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The TG-870 was announced 21 months earlier than the A7R III making the cameras a generation away from one another. Both the cameras come with different body type with the Olympus TG-870 being a Ultracompact camera and the Sony A7R III being a SLR-style mirrorless camera.

Before delving through a comprehensive comparison, below is a brief overview of how the TG-870 grades vs the A7R III in relation to portability, imaging, features and an overall mark.

The following is a sample of the gallery pics for Olympus Stylus Tough TG-870 & Sony Alpha A7R III. The whole galleries are viewable at Olympus TG-870 Gallery & Sony A7R III Gallery.

If you are intending to travel with your camera frequently, you will need to take into account its weight and proportions. The Olympus TG-870 has got outside measurements of 113mm x 64mm x 28mm (4.4" x 2.5" x 1.1") and a weight of 221 grams (0.49 lbs) whilst the Sony A7R III has measurements of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") and a weight of 657 grams (1.45 lbs).

Take a look at the Olympus TG-870 versus Sony A7R III in our brand new Camera plus Lens Size Comparison Tool.

Always remember, the weight of an ILC will differ dependant on the lens you have at that time. Following is the front view dimensions comparison of the TG-870 versus the A7R III.

Looking at dimensions and weight, the portability rating of the TG-870 and A7R III is 91 and 63 respectively.

Normally, its hard to picture the difference in sensor dimensions merely by looking through technical specs. The image underneath should provide you a better sense of the sensor measurements in the TG-870 and A7R III.

As you have seen, the 2 cameras posses different resolutions and different sensor dimensions. The TG-870 with its smaller sensor is going to make shooting shallow DOF trickier and the Sony A7R III will result in extra detail with its extra 26MP. Greater resolution will also enable you to crop images somewhat more aggressively. The more aged TG-870 will be behind when it comes to sensor tech.