Olympus E-M1 vs Sony A7R III

Its time to look a little more closely at the Olympus E-M1 vs Sony A7R III, both Pro Mirrorless digital cameras by manufacturers Olympus and Sony. There exists a sizable gap between the resolutions of the E-M1 (16MP) and A7R III (42MP) and the E-M1 (Four Thirds) and A7R III (Full frame) boast different sensor sizing.

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The E-M1 was manufactured 5 years before the A7R III and that is quite a significant difference as far as technology is concerned. Both the cameras have the same body design (SLR-style mirrorless).

Before going straight to a in depth comparison, here is a short view of how the E-M1 matches up vs the A7R III in regards to portability, imaging, features and an overall grade.

This is a sample of the gallery pics for Olympus OM-D E-M1 & Sony Alpha A7R III. The entire galleries are viewable at Olympus E-M1 Gallery & Sony A7R III Gallery.

In case you're planning to lug around your camera often, you need to consider its weight and size. The Olympus E-M1 offers exterior measurements of 130mm x 94mm x 63mm (5.1" x 3.7" x 2.5") with a weight of 497 grams (1.10 lbs) while the Sony A7R III has specifications of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") with a weight of 657 grams (1.45 lbs).

Check out the Olympus E-M1 vs Sony A7R III in our completely new Camera & Lens Size Comparison Tool.

Take into consideration, the weight of an ILC will change dependant on the lens you are employing during that time. Below is a front view scale comparison of the E-M1 versus the A7R III.

Looking at dimensions and weight, the portability grade of the E-M1 and A7R III is 71 and 63 respectively.

Typically, it is hard to visualize the gap between sensor measurements merely by reviewing specs. The photograph below may offer you a better sense of the sensor measurements in the E-M1 and A7R III.

All in all, both of the cameras provide different resolutions and different sensor measurements. The E-M1 due to its tinier sensor is going to make shooting shallower depth of field tougher and the Sony A7R III will deliver extra detail due to its extra 26 Megapixels. Greater resolution will also allow you to crop pics more aggressively. The older E-M1 is going to be disadvantaged when it comes to sensor technology.