Olympus E-M1 III vs Pentax K-5 IIs

In this article, we are comparing the Olympus E-M1 III versus Pentax K-5 IIs, former being a Pro Mirrorless while the other is a Advanced DSLR by rivals Olympus and Pentax. There exists a large gap among the resolutions of the E-M1 III (20MP) and K-5 IIs (16MP) and the E-M1 III (Four Thirds) and K-5 IIs (APS-C) use totally different sensor measurements.

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The E-M1 III was launched 6 years later than the K-5 IIs and that is a fairly serious difference as far as camera technology is concerned. Both cameras offer different body type with the Olympus E-M1 III being a SLR-style mirrorless camera and the Pentax K-5 IIs being a Mid-size SLR camera.

Before diving through a detailed comparison, below is a short summation of how the E-M1 III grades versus the K-5 IIs in the way of portability, imaging, features and an overall grade.

Here is a sample of the gallery pictures for Olympus OM-D E-M1 Mark III & Pentax K-5 IIs. The complete galleries are provided at Olympus E-M1 III Gallery & Pentax K-5 IIs Gallery.

In case you're looking to lug around your camera often, you will have to take into account its weight and measurements. The Olympus E-M1 III provides physical dimensions of 134mm x 91mm x 69mm (5.3" x 3.6" x 2.7") along with a weight of 580 grams (1.28 lbs) while the Pentax K-5 IIs has proportions of 131mm x 97mm x 73mm (5.2" x 3.8" x 2.9") and a weight of 760 grams (1.68 lbs).

Compare the Olympus E-M1 III versus Pentax K-5 IIs in our completely new Camera & Lens Size Comparison Tool.

Take into account, the weight of an ILC will vary depending on the lens you are employing at that moment. Underneath is the front view overall size comparison of the E-M1 III compared to the K-5 IIs.

Using dimensions and weight, the portability grade of the E-M1 III and K-5 IIs is 67 and 60 respectively.

More often than not, it can be tough to envision the difference in sensor measurements only by looking through a spec sheet. The photograph underneath may give you a better sense of the sensor dimensions in the E-M1 III and K-5 IIs.

As you can see, each of these cameras offer different resolutions and different sensor measurements. The E-M1 III featuring a smaller sensor will make getting shallow DOF harder and the Olympus E-M1 III will render greater detail utilizing its extra 4 Megapixels. Greater resolution will also help you crop photos a little more aggressively. The newer E-M1 III is going to have an edge when it comes to sensor innovation.