Olympus E-M10 IV vs Sony A7R

On this page, we are analyzing the Olympus E-M10 IV and Sony A7R, one being a Entry-Level Mirrorless and the other is a Pro Mirrorless by competitors Olympus and Sony. There exists a big gap among the image resolutions of the E-M10 IV (20MP) and A7R (36MP) and the E-M10 IV (Four Thirds) and A7R (Full frame) boast different sensor sizing.

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The E-M10 IV was unveiled 6 years later than the A7R and that is a fairly big gap as far as camera technology is concerned. Both of these cameras have the same body design (SLR-style mirrorless).

Before going straight to a in-depth comparison, here is a quick highlight of how the E-M10 IV matches up versus the A7R for portability, imaging, features and an overall grade.

The following is a sample of the gallery pics for Olympus OM-D E-M10 IV and Sony Alpha A7R. The full galleries are viewable at Olympus E-M10 IV Gallery and Sony A7R Gallery.

When you are looking to lug around your camera regularly, you will need to consider its weight and size. The Olympus E-M10 IV features outer measurements of 122mm x 84mm x 49mm (4.8" x 3.3" x 1.9") and a weight of 383 grams (0.84 lbs) and 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).

See the Olympus E-M10 IV and Sony A7R in the latest Camera and Lens Size Comparison Tool.

Remember that, the weight of an Interchangeable Lens Camera will change dependant on the lens you are working with at the time. Underneath is a front view physical size comparison of the E-M10 IV vs the A7R.

Taking into account dimensions and weight, the portability grade of the E-M10 IV and A7R is 81 and 78 respectively.

Quite often, it can be difficult to visualize the difference in sensor measurements simply by going through a spec sheet. The graphic below will help give you a stronger sense of the sensor sizing in the E-M10 IV and A7R.

As you can see, both the cameras have different megapixel count and different sensor measurements. The E-M10 IV with its smaller sensor is going to make shooting shallow DOF more challenging and the Sony A7R will produce extra detail having an extra 16 Megapixels. Greater resolution can also allow you to crop pics a bit more aggressively. The fresher E-M10 IV provides an advantage in sensor technology.