Olympus E-M5 III vs Sony A99

In this article, we are looking at the Olympus E-M5 III and Sony A99, former is a Advanced Mirrorless while the other is a Advanced DSLR by manufacturers Olympus and Sony. The image resolution of the E-M5 III (20MP) and the A99 (24MP) is fairly comparable but the E-M5 III (Four Thirds) and A99 (Full frame) possess totally different sensor sizing.

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The E-M5 III was announced 6 years after the A99 which is a fairly serious difference as far as camera tech is concerned. Both of these cameras offer different body type with the Olympus E-M5 III being a SLR-style mirrorless camera and the Sony A99 being a Mid-size SLR camera.

Before we go through a step-by-step comparison, below is a brief introduction of how the E-M5 III matches up versus the A99 when it comes to portability, imaging, features and an overall mark.

This is a sample of the gallery pictures for Olympus OM-D E-M5 III & Sony SLT-A99. The whole galleries are viewable at Olympus E-M5 III Gallery & Sony A99 Gallery.

In case you're looking to travel with your camera, you have to take into account its weight and dimensions. The Olympus E-M5 III has external measurements of 125mm x 85mm x 50mm (4.9" x 3.3" x 2.0") along with a weight of 414 grams (0.91 lbs) whilst the Sony A99 has dimensions of 147mm x 111mm x 78mm (5.8" x 4.4" x 3.1") having a weight of 812 grams (1.79 lbs).

Examine the Olympus E-M5 III and Sony A99 in our newest Camera & Lens Size Comparison Tool.

Remember, the weight of an ILC will differ dependant on the lens you are employing at the time. Following is the front view physical size comparison of the E-M5 III against the A99.

Looking at size and weight, the portability rating of the E-M5 III and A99 is 80 and 57 respectively.

Usually, it is very difficult to envision the contrast in sensor dimensions just by seeing a spec sheet. The pic here might offer you a far better sense of the sensor measurements in the E-M5 III and A99.

Clearly, both cameras enjoy different megapixels and different sensor dimensions. The E-M5 III using its smaller sensor will make achieving shallower DOF trickier and the Sony A99 will provide extra detail with its extra 4MP. Greater resolution will also enable you to crop photos far more aggressively. The fresher E-M5 III is going to have an edge in sensor technology.