Olympus E-M1 III vs Sony A7R II

Below is a comprehensive overview of the Olympus E-M1 III and Sony A7R II, both Pro Mirrorless cameras by companies Olympus and Sony. There exists a crucial gap among the image resolutions of the E-M1 III (20MP) and A7R II (42MP) and the E-M1 III (Four Thirds) and A7R II (Full frame) feature different sensor size.

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The E-M1 III was released 4 years later than the A7R II and that is a fairly serious gap as far as camera technology is concerned. Both of these cameras come with the identical body type (SLR-style mirrorless).

Before going straight into a comprehensive comparison, below is a brief synopsis of how the E-M1 III scores vs the A7R II with respect to portability, imaging, features and an overall grade.

Following is a preview of the gallery images for Olympus OM-D E-M1 Mark III and Sony Alpha A7R II. The complete galleries are provided at Olympus E-M1 III Gallery and Sony A7R II Gallery.

If you are intending to lug around your camera, you'll have to factor its weight and size. The Olympus E-M1 III features outer dimensions of 134mm x 91mm x 69mm (5.3" x 3.6" x 2.7") and a weight of 580 grams (1.28 lbs) whilst the Sony A7R II has specifications of 127mm x 96mm x 60mm (5.0" x 3.8" x 2.4") and a weight of 625 grams (1.38 lbs).

Compare the Olympus E-M1 III and Sony A7R II in the new Camera with Lens Size Comparison Tool.

Don't forget, the weight of an Interchangeable Lens Camera will vary dependant on the lens you choose at that time. Below is the front view measurement comparison of the E-M1 III versus the A7R II.

Looking at dimensions and weight, the portability rating of the E-M1 III and A7R II is 67 and 68 respectively.

Typically, its difficult to picture the contrast in sensor measurements merely by seeing technical specs. The photograph here will help offer you a much better sense of the sensor sizes in the E-M1 III and A7R II.

As you have seen, the two cameras have got different megapixels and different sensor measurements. The E-M1 III featuring a smaller sensor is going to make shooting shallower DOF tougher and the Sony A7R II will show more detail as a result of its extra 22 Megapixels. Higher resolution can also allow you to crop pictures much more aggressively. The newer E-M1 III provides a benefit when it comes to sensor technology.