Olympus E-M5 II vs Sony A77

In this write-up, we will be analyzing the Olympus E-M5 II versus Sony A77, former being a Advanced Mirrorless while the latter is a Advanced DSLR by manufacturers Olympus and Sony. There exists a substantial gap between the sensor resolutions of the E-M5 II (16MP) and A77 (24MP) and the E-M5 II (Four Thirds) and A77 (APS-C) possess totally different sensor dimensions.

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The E-M5 II was revealed 3 years later than the A77 and that is quite a big difference as far as technology is concerned. Both of the cameras offer different body type with the Olympus E-M5 II being a SLR-style mirrorless camera and the Sony A77 being a Mid-size SLR camera.

Before going in to a step-by-step comparison, below is a brief highlight of how the E-M5 II grades versus the A77 for portability, imaging, features and an overall grade.

This is a preview of the gallery images for Olympus OM-D E-M5 II & Sony SLT-A77. The full galleries are available at Olympus E-M5 II Gallery & Sony A77 Gallery.

When you are looking to lug around your camera, you need to factor in its weight and volume. The Olympus E-M5 II comes with exterior dimensions of 124mm x 85mm x 45mm (4.9" x 3.3" x 1.8") along with a weight of 469 grams (1.03 lbs) and the Sony A77 has sizing of 143mm x 104mm x 81mm (5.6" x 4.1" x 3.2") and a weight of 732 grams (1.61 lbs).

See the Olympus E-M5 II versus Sony A77 in our newest Camera & Lens Size Comparison Tool.

Do not forget, the weight of an ILC will change dependant on the lens you choose at that moment. Following is the front view measurements comparison of the E-M5 II compared to the A77.

Using dimensions and weight, the portability score of the E-M5 II and A77 is 80 and 59 respectively.

Normally, it is very tough to visualise the contrast between sensor measurements only by reading through specs. The visual below will provide you a stronger sense of the sensor dimensions in the E-M5 II and A77.

As you can plainly see, both of these cameras offer different megapixel count and different sensor measurements. The E-M5 II having a tinier sensor will make shooting bokeh trickier and the Sony A77 will give more detail because of its extra 8 Megapixels. Higher resolution will also make it easier to crop shots a little more aggressively. The more modern E-M5 II is going to have a benefit in sensor innovation.