Olympus E-M1 vs Pentax K100D S

In this write-up, we are comparing the Olympus E-M1 and Pentax K100D S, former is a Pro Mirrorless while the other is a Entry-Level DSLR by companies Olympus and Pentax. There exists a noticeable gap between the image resolutions of the E-M1 (16MP) and K100D S (6MP) and the E-M1 (Four Thirds) and K100D S (APS-C) use totally different sensor sizes.

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The E-M1 was introduced 6 years after the K100D S which is quite a sizable difference as far as technology is concerned. Both of these cameras offer different body type with the Olympus E-M1 being a SLR-style mirrorless camera and the Pentax K100D S being a Compact SLR camera.

Before we go in to a step-by-step comparison, below is a brief highlight of how the E-M1 scores vs the K100D S with regards to portability, imaging, features and an overall mark.

The following is a sample of the gallery pictures for Olympus OM-D E-M1 & Pentax K100D Super. The whole galleries are available at Olympus E-M1 Gallery & Pentax K100D S Gallery.

When you are planning to travel with your camera often, you're going to have to take into account its weight and measurements. The Olympus E-M1 enjoys physical measurements of 130mm x 94mm x 63mm (5.1" x 3.7" x 2.5") along with a weight of 497 grams (1.10 lbs) and the Pentax K100D S has proportions of 129mm x 91mm x 71mm (5.1" x 3.6" x 2.8") with a weight of 646 grams (1.42 lbs).

See the Olympus E-M1 and Pentax K100D S in our brand new Camera plus Lens Size Comparison Tool.

Remember that, the weight of an ILC will differ dependant on the lens you have chosen during that time. Underneath is the front view physical size comparison of the E-M1 vs the K100D S.

Taking into consideration dimensions and weight, the portability score of the E-M1 and K100D S is 71 and 65 respectively.

Quite often, its tough to envision the difference between sensor dimensions simply by reading specs. The image below might provide you a far better sense of the sensor measurements in the E-M1 and K100D S.

All in all, both of the cameras enjoy different resolutions and different sensor dimensions. The E-M1 using its tinier sensor will make achieving shallow DOF tougher and the Olympus E-M1 will offer greater detail using its extra 10 Megapixels. Greater resolution can also allow you to crop photos far more aggressively. The fresher E-M1 will have a benefit with regard to sensor technology.