Olympus E-PL1s vs Pentax K-S1

Lets look a little more closely at the Olympus E-PL1s and Pentax K-S1, one being a Entry-Level Mirrorless and the other is a Advanced DSLR by manufacturers Olympus and Pentax. There exists a crucial gap between the image resolutions of the E-PL1s (12MP) and K-S1 (20MP) and the E-PL1s (Four Thirds) and K-S1 (APS-C) boast different sensor sizing.

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The E-PL1s was released 4 years prior to the K-S1 and that is quite a serious gap as far as technology is concerned. Both the cameras have different body design with the Olympus E-PL1s being a Rangefinder-style mirrorless camera and the Pentax K-S1 being a Mid-size SLR camera.

Before diving straight to a step-by-step comparison, here is a quick highlight of how the E-PL1s scores vs the K-S1 when considering portability, imaging, features and an overall grade.

The following is a sample of the gallery pictures for Olympus PEN E-PL1s and Pentax K-S1. The complete galleries are available at Olympus E-PL1s Gallery and Pentax K-S1 Gallery.

In case you're looking to lug around your camera regularly, you'll need to take into account its weight and dimensions. The Olympus E-PL1s features outer measurements of 115mm x 72mm x 42mm (4.5" x 2.8" x 1.7") having a weight of 334 grams (0.74 lbs) whilst the Pentax K-S1 has dimensions of 121mm x 93mm x 70mm (4.8" x 3.7" x 2.8") along with a weight of 558 grams (1.23 lbs).

Take a look at the Olympus E-PL1s and Pentax K-S1 in the latest Camera and Lens Size Comparison Tool.

Take into account, the weight of an Interchangeable Lens Camera will change based on the lens you are using at the time. Here is a front view overall size comparison of the E-PL1s compared to the K-S1.

Taking into consideration dimensions and weight, the portability score of the E-PL1s and K-S1 is 86 and 69 respectively.

Typically, its tough to picture the contrast between sensor measurements merely by looking at specs. The graphic underneath might offer you a much better sense of the sensor sizing in the E-PL1s and K-S1.

All in all, both of these cameras provide different resolutions and different sensor measurements. The E-PL1s featuring a tinier sensor is going to make shooting shallower DOF more challenging and the Pentax K-S1 will give you greater detail as a result of its extra 8 Megapixels. Greater resolution will also enable you to crop photos more aggressively. The older E-PL1s is going to be disadvantaged with regard to sensor tech.