Olympus E-M1 III vs Pentax K-S2

Its time to take a more detailed look at the Olympus E-M1 III vs Pentax K-S2, one being a Pro Mirrorless and the other is a Entry-Level DSLR by competitors Olympus and Pentax. The image resolution of the E-M1 III (20MP) and the K-S2 (20MP) is fairly close but the E-M1 III (Four Thirds) and K-S2 (APS-C) possess totally different sensor size.

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The E-M1 III was manufactured 5 years later than the K-S2 and that is a fairly large gap as far as camera tech is concerned. Both cameras offer different body type with the Olympus E-M1 III being a SLR-style mirrorless camera and the Pentax K-S2 being a Compact SLR camera.

Before delving straight into a in depth comparison, below is a short synopsis of how the E-M1 III matches up versus the K-S2 with respect to portability, imaging, features and an overall rating.

This is a sample of the gallery pictures for Olympus OM-D E-M1 Mark III and Pentax K-S2. The entire galleries are available at Olympus E-M1 III Gallery and Pentax K-S2 Gallery.

For those who are planning to carry your camera regularly, you're going to have to factor its weight and size. The Olympus E-M1 III offers outside measurements of 134mm x 91mm x 69mm (5.3" x 3.6" x 2.7") accompanied by a weight of 580 grams (1.28 lbs) while the Pentax K-S2 has specifications of 123mm x 91mm x 73mm (4.8" x 3.6" x 2.9") accompanied by a weight of 678 grams (1.49 lbs).

Compare the Olympus E-M1 III vs Pentax K-S2 in the new Camera and Lens Size Comparison Tool.

Don't forget, the weight of an Interchangeable Lens Camera will differ dependant on the lens you are employing at that time. Here is the front view sizing comparison of the E-M1 III vs the K-S2.

Taking into account size and weight, the portability grade of the E-M1 III and K-S2 is 67 and 64 respectively.

Often, it is very difficult to see the gap in sensor sizing only by viewing technical specs. The photograph here will help offer you a clearer sense of the sensor measurements in the E-M1 III and K-S2.

As you have seen, the 2 cameras enjoy the same exact MP but not the same sensor sizing. The E-M1 III features the smaller sensor which is going to make getting shallow DOF harder. The newer E-M1 III is going to have a benefit when it comes to sensor innovation.