Olympus E-M1 III vs Olympus E-PM1

Its time to look more in depth at the Olympus E-M1 III and Olympus E-PM1, former being a Pro Mirrorless while the other is a Entry-Level Mirrorless and both are sold by Olympus. There is a substantial difference among the image resolutions of the E-M1 III (20MP) and E-PM1 (12MP) but both cameras boast the same sensor size (Four Thirds).

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The E-M1 III was announced 8 years later than the E-PM1 and that is a fairly big difference as far as camera tech is concerned. Both of these cameras have different body design with the Olympus E-M1 III being a SLR-style mirrorless camera and the Olympus E-PM1 being a Rangefinder-style mirrorless camera.

Before getting right into a in depth comparison, here is a concise view of how the E-M1 III scores vs the E-PM1 in terms of portability, imaging, features and an overall rating.

Here is a sample of the gallery pictures for Olympus OM-D E-M1 Mark III & Olympus PEN E-PM1. The whole galleries are viewable at Olympus E-M1 III Gallery & Olympus E-PM1 Gallery.

If you're planning to carry your camera, you'll have to factor its weight and proportions. The Olympus E-M1 III enjoys outside dimensions of 134mm x 91mm x 69mm (5.3" x 3.6" x 2.7") having a weight of 580 grams (1.28 lbs) and the Olympus E-PM1 has measurements of 110mm x 64mm x 34mm (4.3" x 2.5" x 1.3") along with a weight of 265 grams (0.58 lbs).

Check out the Olympus E-M1 III and Olympus E-PM1 in our newest Camera plus Lens Size Comparison Tool.

Take into consideration, the weight of an ILC will differ dependant on the lens you are using at that time. Below is a front view scale comparison of the E-M1 III against the E-PM1.

Factoring in size and weight, the portability score of the E-M1 III and E-PM1 is 67 and 89 respectively.

In many cases, it is very hard to envision the contrast in sensor sizing simply by seeing specs. The visual here will provide you a greater sense of the sensor dimensions in the E-M1 III and E-PM1.

As you can plainly see, both of these cameras have the same sensor dimensions but not the same resolution. You can anticipate the Olympus E-M1 III to show greater detail with its extra 8MP. Greater resolution will also make it easier to crop photos a bit more aggressively. The more modern E-M1 III is going to have a benefit when it comes to sensor technology.