Olympus E-M10 vs Pentax K-S1

Below, we will be looking at the Olympus E-M10 and Pentax K-S1, one is a Entry-Level Mirrorless and the latter is a Advanced DSLR by companies Olympus and Pentax. The image resolution of the E-M10 (16MP) and the K-S1 (20MP) is pretty close but the E-M10 (Four Thirds) and K-S1 (APS-C) enjoy different sensor measurements.

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The E-M10 was launched 5 months before the K-S1 and they are of a similar generation. Both of these cameras come with different body type with the Olympus E-M10 being a SLR-style mirrorless camera and the Pentax K-S1 being a Mid-size SLR camera.

Before getting through a more detailed comparison, below is a simple summation of how the E-M10 grades vs the K-S1 in regards to portability, imaging, features and an overall mark.

Here is a preview of the gallery images for Olympus OM-D E-M10 and Pentax K-S1. The complete galleries are provided at Olympus E-M10 Gallery and Pentax K-S1 Gallery.

If you're planning to travel with your camera, you'll need to think about its weight and size. The Olympus E-M10 has exterior dimensions of 119mm x 82mm x 46mm (4.7" x 3.2" x 1.8") and a weight of 396 grams (0.87 lbs) while the Pentax K-S1 has specifications of 121mm x 93mm x 70mm (4.8" x 3.7" x 2.8") having a weight of 558 grams (1.23 lbs).

Look at the Olympus E-M10 and Pentax K-S1 in the new Camera with Lens Size Comparison Tool.

Do not forget, the weight of an Interchangeable Lens Camera will differ depending on the lens you select at that time. Underneath is the front view overall size comparison of the E-M10 versus the K-S1.

Looking at size and weight, the portability grade of the E-M10 and K-S1 is 82 and 69 respectively.

Often, it is tough to picture the contrast in sensor dimensions purely by viewing a spec sheet. The picture below will help give you a more clear sense of the sensor dimensions in the E-M10 and K-S1.

Clearly, both the cameras posses different megapixels and different sensor dimensions. The E-M10 due to its smaller sensor is going to make achieving shallower depth of field trickier and the Pentax K-S1 will result in greater detail utilizing its extra 4MP. Higher resolution can also enable you to crop shots somewhat more aggressively.