Olympus E-M10 vs Sony A7R III

Here, we will be comparing the Olympus E-M10 vs Sony A7R III, former being a Entry-Level Mirrorless while the latter is a Pro Mirrorless by brands Olympus and Sony. There is a substantial difference between the resolutions of the E-M10 (16MP) and A7R III (42MP) and the E-M10 (Four Thirds) and A7R III (Full frame) posses different sensor size.

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The E-M10 was announced 4 years earlier than the A7R III and that is quite a big difference as far as tech is concerned. Each of the cameras feature the same body design (SLR-style mirrorless).

Before going into a comprehensive comparison, here is a quick highlight of how the E-M10 grades against the A7R III when it comes to portability, imaging, features and an overall grade.

This is a preview of the gallery photos for Olympus OM-D E-M10 & Sony Alpha A7R III. The whole galleries are available at Olympus E-M10 Gallery & Sony A7R III Gallery.

If you are intending to lug around your camera regularly, you will have to factor its weight and measurements. The Olympus E-M10 features external dimensions of 119mm x 82mm x 46mm (4.7" x 3.2" x 1.8") with a weight of 396 grams (0.87 lbs) whilst the Sony A7R III has proportions of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") along with a weight of 657 grams (1.45 lbs).

Analyze the Olympus E-M10 vs Sony A7R III in our newest Camera & Lens Size Comparison Tool.

Always remember, the weight of an ILC will change dependant on the lens you have attached at that moment. Below is a front view dimensions comparison of the E-M10 compared to the A7R III.

Factoring in size and weight, the portability score of the E-M10 and A7R III is 82 and 63 respectively.

In many cases, it is difficult to imagine the difference between sensor measurements only by checking a spec sheet. The visual below may provide you a greater sense of the sensor dimensions in the E-M10 and A7R III.

As you can see, both of those cameras come with different megapixels and different sensor measurements. The E-M10 using its tinier sensor is going to make shooting shallower DOF trickier and the Sony A7R III will resolve more detail with its extra 26MP. Higher resolution can also make it easier to crop shots a good deal more aggressively. The older E-M10 is going to be disadvantaged with regard to sensor innovation.