Olympus E-M10 III vs Sony A77

Below is a extensive assessment of the Olympus E-M10 III vs Sony A77, former being a Entry-Level Mirrorless while the latter is a Advanced DSLR by manufacturers Olympus and Sony. There is a large difference between the resolutions of the E-M10 III (16MP) and A77 (24MP) and the E-M10 III (Four Thirds) and A77 (APS-C) possess different sensor size.

Photography Glossary

The E-M10 III was manufactured 5 years later than the A77 and that is quite a serious difference as far as tech is concerned. Each of these cameras come with different body type with the Olympus E-M10 III being a SLR-style mirrorless camera and the Sony A77 being a Mid-size SLR camera.

Before we go in to a comprehensive comparison, below is a concise introduction of how the E-M10 III scores versus the A77 with regard to portability, imaging, features and an overall grade.

Following is a preview of the gallery photos for Olympus OM-D E-M10 Mark III & Sony SLT-A77. The entire galleries are available at Olympus E-M10 III Gallery & Sony A77 Gallery.

When you are planning to lug around your camera frequently, you should factor in its weight and size. The Olympus E-M10 III offers exterior measurements of 122mm x 84mm x 50mm (4.8" x 3.3" x 2.0") accompanied by a weight of 410 grams (0.90 lbs) while the Sony A77 has specifications of 143mm x 104mm x 81mm (5.6" x 4.1" x 3.2") accompanied by a weight of 732 grams (1.61 lbs).

See the Olympus E-M10 III vs Sony A77 in our brand new Camera & Lens Size Comparison Tool.

Remember, the weight of an ILC will change dependant on the lens you are using at the time. The following is the front view overall size comparison of the E-M10 III vs the A77.

Factoring in size and weight, the portability rating of the E-M10 III and A77 is 80 and 59 respectively.

Generally, its tough to visualize the gap between sensor measurements simply by reviewing technical specs. The visual here may offer you a stronger sense of the sensor measurements in the E-M10 III and A77.

As you can tell, the 2 cameras have got different resolutions and different sensor measurements. The E-M10 III due to its tinier sensor is going to make getting shallow DOF tougher and the Sony A77 will offer extra detail due to its extra 8 Megapixels. Higher resolution will enable you to crop shots much more aggressively. The newer E-M10 III should have an edge in sensor innovation.