Olympus E-M5 II vs Pentax K-S1

The following is a detailed review of the Olympus E-M5 II and Pentax K-S1, one is a Advanced Mirrorless and the latter is a Advanced DSLR by competitors Olympus and Pentax. The image resolution of the E-M5 II (16MP) and the K-S1 (20MP) is pretty close but the E-M5 II (Four Thirds) and K-S1 (APS-C) enjoy different sensor size.

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The E-M5 II was brought out 6 months after the K-S1 which means that they are of a similar generation. Both of these cameras come with different body type with the Olympus E-M5 II being a SLR-style mirrorless camera and the Pentax K-S1 being a Mid-size SLR camera.

Before delving in to a comprehensive comparison, below is a short highlight of how the E-M5 II grades vs the K-S1 for portability, imaging, features and an overall mark.

The following is a preview of the gallery images for Olympus OM-D E-M5 II and Pentax K-S1. The entire galleries are provided at Olympus E-M5 II Gallery and Pentax K-S1 Gallery.

If you are looking to travel with your camera regularly, you should take into account its weight and proportions. The Olympus E-M5 II features external dimensions of 124mm x 85mm x 45mm (4.9" x 3.3" x 1.8") along with a weight of 469 grams (1.03 lbs) while the Pentax K-S1 has measurements of 121mm x 93mm x 70mm (4.8" x 3.7" x 2.8") having a weight of 558 grams (1.23 lbs).

Contrast the Olympus E-M5 II and Pentax K-S1 in the new Camera with Lens Size Comparison Tool.

Bear in mind, the weight of an Interchangeable Lens Camera will vary based on the lens you use at that moment. Underneath is the front view proportions comparison of the E-M5 II and the K-S1.

Taking into consideration dimensions and weight, the portability rating of the E-M5 II and K-S1 is 80 and 69 respectively.

Normally, it's difficult to picture the difference in sensor dimensions just by researching a spec sheet. The pic here should offer you a more clear sense of the sensor sizes in the E-M5 II and K-S1.

As you can see, each of these cameras have got different resolutions and different sensor dimensions. The E-M5 II because of its smaller sensor is going to make achieving shallower depth of field trickier and the Pentax K-S1 will result in extra detail having its extra 4 Megapixels. Higher resolution will allow you to crop pictures much more aggressively.