Olympus E-M5 III vs Sony A57

Here, we are contrasting the Olympus E-M5 III vs Sony A57, former being a Advanced Mirrorless while the other is a Entry-Level DSLR by competitors Olympus and Sony. There is a considerable difference between the sensor resolutions of the E-M5 III (20MP) and A57 (16MP) and the E-M5 III (Four Thirds) and A57 (APS-C) boast totally different sensor dimensions.

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The E-M5 III was announced 7 years later than the A57 and that is quite a large difference as far as tech is concerned. Each of the cameras feature different body design with the Olympus E-M5 III being a SLR-style mirrorless camera and the Sony A57 being a Compact SLR camera.

Before delving into a thorough comparison, here is a quick synopsis of how the E-M5 III scores vs the A57 for portability, imaging, features and an overall grade.

The following is a sample of the gallery pics for Olympus OM-D E-M5 III & Sony SLT-A57. The whole galleries are available at Olympus E-M5 III Gallery & Sony A57 Gallery.

If you are going to lug around your camera frequently, you have to consider its weight and measurements. The Olympus E-M5 III comes with outside dimensions of 125mm x 85mm x 50mm (4.9" x 3.3" x 2.0") with a weight of 414 grams (0.91 lbs) and the Sony A57 has proportions of 132mm x 98mm x 81mm (5.2" x 3.9" x 3.2") with a weight of 618 grams (1.36 lbs).

Check out the Olympus E-M5 III vs Sony A57 in our completely new Camera plus Lens Size Comparison Tool.

Remember, the weight of an ILC will change dependant on the lens you have chosen at that moment. Here is a front view overall size comparison of the E-M5 III and the A57.

Considering size and weight, the portability grade of the E-M5 III and A57 is 80 and 64 respectively.

Often, it's hard to see the difference between sensor measurements just by reviewing specifications. The photograph below may give you a much better sense of the sensor dimensions in the E-M5 III and A57.

Plainly, the two cameras come with different megapixels and different sensor measurements. The E-M5 III using its tinier sensor will make shooting shallow depth of field tougher and the Olympus E-M5 III will offer you greater detail with its extra 4 Megapixels. Greater resolution will also make it easier to crop pics a good deal more aggressively. The more recent E-M5 III will have an advantage in sensor technology.