Olympus E-M1 III vs Sony A7R

Below is a extensive overview of the Olympus E-M1 III vs Sony A7R, both Pro Mirrorless cameras by companies Olympus and Sony. There exists a noticeable gap among the resolutions of the E-M1 III (20MP) and A7R (36MP) and the E-M1 III (Four Thirds) and A7R (Full frame) possess different sensor measurements.

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The E-M1 III was announced 6 years later than the A7R and that is a fairly sizable difference as far as camera technology is concerned. The two cameras offer the identical body type (SLR-style mirrorless).

Before diving straight into a thorough comparison, below is a quick summation of how the E-M1 III matches up vs the A7R in relation to portability, imaging, features and an overall grade.

Following is a sample of the gallery pics for Olympus OM-D E-M1 Mark III & Sony Alpha A7R. The whole galleries are available at Olympus E-M1 III Gallery & Sony A7R Gallery.

In case you're aiming to lug around your camera often, you're going to have to take into account its weight and size. The Olympus E-M1 III enjoys physical dimensions of 134mm x 91mm x 69mm (5.3" x 3.6" x 2.7") with a weight of 580 grams (1.28 lbs) whilst the Sony A7R has specifications of 127mm x 94mm x 48mm (5.0" x 3.7" x 1.9") along with a weight of 465 grams (1.03 lbs).

Compare the Olympus E-M1 III vs Sony A7R in our brand new Camera & Lens Size Comparison Tool.

Bear in mind, the weight of an ILC will change based on the lens you are utilizing at that time. Here is the front view size comparison of the E-M1 III versus the A7R.

Taking into consideration dimensions and weight, the portability score of the E-M1 III and A7R is 67 and 78 respectively.

More often than not, it's hard to visualize the contrast in sensor measurements only by seeing a spec sheet. The graphic below may give you a stronger sense of the sensor dimensions in the E-M1 III and A7R.

As you can see, both of the cameras offer different resolutions and different sensor measurements. The E-M1 III having a smaller sensor is going to make shooting shallower DOF more difficult and the Sony A7R will produce extra detail with its extra 16 Megapixels. Greater resolution will enable you to crop images a little more aggressively. The newer E-M1 III should have a benefit in sensor innovation.