Olympus E-PM2 vs Sony a5100

Here, we are evaluating the Olympus E-PM2 and Sony a5100, both Entry-Level Mirrorless digital cameras by rivals Olympus and Sony. There exists a large gap between the image resolutions of the E-PM2 (16MP) and a5100 (24MP) and the E-PM2 (Four Thirds) and a5100 (APS-C) have totally different sensor measurements.

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The E-PM2 was brought out 15 months prior to the a5100 making them a generation apart from one another. Both the cameras feature the same body design (Rangefinder-style mirrorless).

Before we go into a in depth comparison, here is a quick summation of how the E-PM2 matches up against the a5100 when considering portability, imaging, features and an overall rating.

This is a sample of the gallery pics for Olympus PEN E-PM2 & Sony Alpha a5100. The entire galleries are provided at Olympus E-PM2 Gallery & Sony a5100 Gallery.

When you are intending to carry your camera, you will want to factor in its weight and proportions. The Olympus E-PM2 provides outside measurements of 110mm x 64mm x 34mm (4.3" x 2.5" x 1.3") with a weight of 269 grams (0.59 lbs) whilst the Sony a5100 has measurements of 110mm x 63mm x 36mm (4.3" x 2.5" x 1.4") along with a weight of 283 grams (0.62 lbs).

Take a look at the Olympus E-PM2 and Sony a5100 in our completely new Camera & Lens Size Comparison Tool.

Take into consideration, the weight of an ILC will vary based on the lens you use at the time. The following is a front view proportions comparison of the E-PM2 vs the a5100.

Factoring in dimensions and weight, the portability rating of the E-PM2 and a5100 is 89 and 89 respectively.

Typically, it's hard to envision the difference between sensor sizing purely by reviewing a spec sheet. The photograph below might give you a better sense of the sensor measurements in the E-PM2 and a5100.

Clearly, both the cameras feature different megapixels and different sensor sizing. The E-PM2 due to its tinier sensor will make getting shallower DOF more difficult and the Sony a5100 will offer greater detail having its extra 8MP. Greater resolution can also enable you to crop images way more aggressively. The older E-PM2 is going to be behind when it comes to sensor innovation.