Olympus E-M10 IV vs Sony A77

Let's examine more in depth at the Olympus E-M10 IV vs Sony A77, one being a Entry-Level Mirrorless and the other is a Advanced DSLR by competitors Olympus and Sony. The image resolution of the E-M10 IV (20MP) and the A77 (24MP) is very comparable but the E-M10 IV (Four Thirds) and A77 (APS-C) enjoy totally different sensor dimensions.

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The E-M10 IV was announced 8 years later than the A77 and that is a fairly serious gap as far as camera tech is concerned. Both cameras offer different body type with the Olympus E-M10 IV being a SLR-style mirrorless camera and the Sony A77 being a Mid-size SLR camera.

Before delving through a thorough comparison, below is a short summation of how the E-M10 IV matches up vs the A77 in the way of portability, imaging, features and an overall grade.

Below is a sample of the gallery pics for Olympus OM-D E-M10 IV and Sony SLT-A77. The whole galleries are available at Olympus E-M10 IV Gallery and Sony A77 Gallery.

In case you're aiming to lug around your camera regularly, you have to take into account its weight and size. The Olympus E-M10 IV offers outside dimensions of 122mm x 84mm x 49mm (4.8" x 3.3" x 1.9") with a weight of 383 grams (0.84 lbs) whilst 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).

Examine the Olympus E-M10 IV vs Sony A77 in the all new Camera with Lens Size Comparison Tool.

Take into consideration, the weight of an Interchangeable Lens Camera will differ depending on the lens you use at the time. Here is the front view sizing comparison of the E-M10 IV and the A77.

Taking into account size and weight, the portability grade of the E-M10 IV and A77 is 81 and 59 respectively.

Often, it can be difficult to see the difference in sensor measurements just by checking out specifications. The photograph below will give you a clearer sense of the sensor sizes in the E-M10 IV and A77.

To sum up, the two cameras offer different megapixels and different sensor measurements. The E-M10 IV having a smaller sensor will make achieving shallow DOF more challenging and the Sony A77 will provide greater detail with its extra 4MP. Greater resolution will also help you crop images a little more aggressively. The more modern E-M10 IV is going to have an advantage in sensor tech.