Olympus E-M5 III vs Sony A77

On this page, we are matching up the Olympus E-M5 III versus Sony A77, former being a Advanced Mirrorless while the other is a Advanced DSLR by rivals Olympus and Sony. The sensor resolution of the E-M5 III (20MP) and the A77 (24MP) is very well matched but the E-M5 III (Four Thirds) and A77 (APS-C) boast totally different sensor dimensions.

Japan-exclusive Leica Leitz Phone 3 features big sensor and new modes

The E-M5 III was brought out 8 years later than the A77 and that is quite a large difference as far as tech is concerned. Each of the cameras have different body design with the Olympus E-M5 III being a SLR-style mirrorless camera and the Sony A77 being a Mid-size SLR camera.

Before getting straight to a comprehensive comparison, here is a simple view of how the E-M5 III matches up against the A77 in relation to portability, imaging, features and an overall grade.

Below is a sample of the gallery pics for Olympus OM-D E-M5 III & Sony SLT-A77. The entire galleries are provided at Olympus E-M5 III Gallery & Sony A77 Gallery.

If you are intending to lug around your camera often, you will need to factor its weight and measurements. The Olympus E-M5 III offers external measurements of 125mm x 85mm x 50mm (4.9" x 3.3" x 2.0") accompanied by a weight of 414 grams (0.91 lbs) whilst the Sony A77 has proportions of 143mm x 104mm x 81mm (5.6" x 4.1" x 3.2") accompanied by a weight of 732 grams (1.61 lbs).

Check out the Olympus E-M5 III versus Sony A77 in our brand new Camera & Lens Size Comparison Tool.

Remember, the weight of an ILC will differ depending on the lens you select during that time. Here is a front view sizing comparison of the E-M5 III versus the A77.

Taking into account size and weight, the portability rating of the E-M5 III and A77 is 80 and 59 respectively.

In many cases, it is hard to envision the contrast between sensor measurements simply by checking specs. The photograph here will offer you a far better sense of the sensor measurements in the E-M5 III and A77.

As you can plainly see, the two cameras have different megapixels and different sensor measurements. The E-M5 III featuring a tinier sensor will make achieving shallow depth of field harder and the Sony A77 will give you more detail having its extra 4MP. Greater resolution can also help you crop images a bit more aggressively. The younger E-M5 III is going to have a benefit when it comes to sensor technology.