Olympus E-M1 III vs Sony A6600

Below, we will be contrasting the Olympus E-M1 III and Sony A6600, former being a Pro Mirrorless while the latter is a Advanced Mirrorless by companies Olympus and Sony. The image resolution of the E-M1 III (20MP) and the A6600 (24MP) is relatively comparable but the E-M1 III (Four Thirds) and A6600 (APS-C) enjoy totally different sensor sizing.

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The E-M1 III was manufactured 6 months later than the A6600 so they are both of a similar age. Each of these cameras come with different body type with the Olympus E-M1 III being a SLR-style mirrorless camera and the Sony A6600 being a Rangefinder-style mirrorless camera.

Before delving in to a in depth comparison, below is a simple introduction of how the E-M1 III scores against the A6600 for portability, imaging, features and an overall grade.

This is a preview of the gallery photos for Olympus OM-D E-M1 Mark III & Sony Alpha a6600. The entire galleries are available at Olympus E-M1 III Gallery & Sony A6600 Gallery.

For anyone who is planning to lug around your camera often, you should think about its weight and measurements. The Olympus E-M1 III features outside measurements of 134mm x 91mm x 69mm (5.3" x 3.6" x 2.7") with a weight of 580 grams (1.28 lbs) while the Sony A6600 has proportions of 120mm x 67mm x 69mm (4.7" x 2.6" x 2.7") having a weight of 503 grams (1.11 lbs).

Contrast the Olympus E-M1 III and Sony A6600 in our brand new Camera plus Lens Size Comparison Tool.

Keep in mind, the weight of an ILC will change depending on the lens you have at that moment. Below is the front view size comparison of the E-M1 III vs the A6600.

Taking into consideration dimensions and weight, the portability grade of the E-M1 III and A6600 is 67 and 77 respectively.

Sometimes, it is very tough to visualise the contrast in sensor measurements purely by going through technical specs. The visual underneath might give you a clearer sense of the sensor measurements in the E-M1 III and A6600.

As you have seen, the two cameras posses different megapixels and different sensor measurements. The E-M1 III due to its smaller sensor will make shooting shallow DOF more challenging and the Sony A6600 will show greater detail due to its extra 4 Megapixels. Higher resolution will also help you crop pictures somewhat more aggressively.