Olympus E-M5 III vs Sony A6400

Below is a thorough review of the Olympus E-M5 III versus Sony A6400, both Advanced Mirrorless cameras by manufacturers Olympus and Sony. The sensor resolution of the E-M5 III (20MP) and the A6400 (24MP) is pretty comparable but the E-M5 III (Four Thirds) and A6400 (APS-C) have totally different sensor sizing.

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The E-M5 III was unveiled 10 months later than the A6400 and they are both of a similar generation. Both the cameras have different body design with the Olympus E-M5 III being a SLR-style mirrorless camera and the Sony A6400 being a Rangefinder-style mirrorless camera.

Before delving straight to a in-depth comparison, here is a concise summary of how the E-M5 III matches up vs the A6400 when considering portability, imaging, features and an overall grade.

The following is a preview of the gallery images for Olympus OM-D E-M5 III and Sony Alpha a6400. The full galleries are available at Olympus E-M5 III Gallery and Sony A6400 Gallery.

If you are going to lug around your camera, you should think about its weight and volume. The Olympus E-M5 III comes with external measurements of 125mm x 85mm x 50mm (4.9" x 3.3" x 2.0") having a weight of 414 grams (0.91 lbs) and the Sony A6400 has sizing of 120mm x 67mm x 50mm (4.7" x 2.6" x 2.0") and a weight of 403 grams (0.89 lbs).

Look at the Olympus E-M5 III versus Sony A6400 in the all new Camera with Lens Size Comparison Tool.

Always remember, the weight of an Interchangeable Lens Camera will vary depending on the lens you are working with at the time. The following is a front view proportions comparison of the E-M5 III and the A6400.

Looking at size and weight, the portability rating of the E-M5 III and A6400 is 80 and 83 respectively.

Usually, it is very difficult to envision the difference in sensor measurements merely by seeing technical specs. The graphic underneath might offer you a better sense of the sensor measurements in the E-M5 III and A6400.

As you have seen, the two cameras have different megapixels and different sensor measurements. The E-M5 III having a smaller sensor will make achieving shallower DOF trickier and the Sony A6400 will produce extra detail having an extra 4MP. Higher resolution will also enable you to crop photographs a bit more aggressively. The newer E-M5 III is going to have a benefit in sensor technology.