Olympus E-M5 vs Sony A7R III

In this article, we are matching up the Olympus E-M5 vs Sony A7R III, former is a Advanced Mirrorless while the other is a Pro Mirrorless by competitors Olympus and Sony. There exists a considerable gap among the sensor resolutions of the E-M5 (16MP) and A7R III (42MP) and the E-M5 (Four Thirds) and A7R III (Full frame) use different sensor sizing.

Pentax 17 Pre-Orders Outperform Expectations by a Landslide

The E-M5 was introduced 6 years prior to the A7R III which is a fairly large difference as far as camera technology is concerned. Both of the cameras offer the identical body type (SLR-style mirrorless).

Before going through a full comparison, below is a concise highlight of how the E-M5 grades versus the A7R III in regards to portability, imaging, features and an overall score.

Following is a sample of the gallery pictures for Olympus OM-D E-M5 & Sony Alpha A7R III. The whole galleries are available at Olympus E-M5 Gallery & Sony A7R III Gallery.

If you're looking to carry around your camera frequently, you should take into account its weight and proportions. The Olympus E-M5 provides external measurements of 122mm x 89mm x 43mm (4.8" x 3.5" x 1.7") accompanied by a weight of 425 grams (0.94 lbs) and the Sony A7R III has measurements of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") with a weight of 657 grams (1.45 lbs).

Take a look at the Olympus E-M5 vs Sony A7R III in our completely new Camera & Lens Size Comparison Tool.

Always remember, the weight of an ILC will differ depending on the lens you have chosen during that time. Here is the front view over all size comparison of the E-M5 versus the A7R III.

Considering dimensions and weight, the portability score of the E-M5 and A7R III is 81 and 63 respectively.

Normally, its difficult to imagine the gap in sensor sizes only by seeing specifications. The pic underneath will help offer you a stronger sense of the sensor measurements in the E-M5 and A7R III.

To sum up, the 2 cameras enjoy different resolutions and different sensor sizes. The E-M5 using its smaller sensor is going to make shooting shallower DOF tougher and the Sony A7R III will produce extra detail using its extra 26MP. Greater resolution will also enable you to crop photos far more aggressively. The more aged E-M5 will be behind in sensor tech.