Olympus E-M5 III vs Pentax K20D

Let's look more in depth at the Olympus E-M5 III and Pentax K20D, former being a Advanced Mirrorless while the latter is a Advanced DSLR by companies Olympus and Pentax. There is a considerable difference among the sensor resolutions of the E-M5 III (20MP) and K20D (15MP) and the E-M5 III (Four Thirds) and K20D (APS-C) posses different sensor size.

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The E-M5 III was introduced 11 years later than the K20D and that is a fairly large difference as far as camera tech is concerned. Each of these cameras feature different body design with the Olympus E-M5 III being a SLR-style mirrorless camera and the Pentax K20D being a Mid-size SLR camera.

Before we go right into a comprehensive comparison, here is a quick overview of how the E-M5 III scores versus the K20D with respect to portability, imaging, features and an overall grade.

Following is a preview of the gallery photos for Olympus OM-D E-M5 III & Pentax K20D. The whole galleries are provided at Olympus E-M5 III Gallery & Pentax K20D Gallery.

In case you're going to lug around your camera, you'll have to think about its weight and size. The Olympus E-M5 III features outside dimensions of 125mm x 85mm x 50mm (4.9" x 3.3" x 2.0") and a weight of 414 grams (0.91 lbs) and the Pentax K20D has specifications of 142mm x 101mm x 70mm (5.6" x 4.0" x 2.8") with a weight of 800 grams (1.76 lbs).

Contrast the Olympus E-M5 III and Pentax K20D in our brand new Camera & Lens Size Comparison Tool.

Always remember, the weight of an ILC will change depending on the lens you have chosen at that time. Following is a front view dimensions comparison of the E-M5 III vs the K20D.

Taking into consideration size and weight, the portability rating of the E-M5 III and K20D is 80 and 59 respectively.

In many cases, it can be difficult to visualize the difference in sensor measurements only by researching technical specs. The photograph here will offer you a far better sense of the sensor dimensions in the E-M5 III and K20D.

As you have seen, both cameras come with different megapixels and different sensor measurements. The E-M5 III having a smaller sensor is going to make shooting shallow DOF harder and the Olympus E-M5 III will provide you with greater detail using its extra 5MP. Higher resolution can also allow you to crop photographs a good deal more aggressively. The more modern E-M5 III should have an advantage in sensor innovation.