Olympus E-P1 vs Sony A7R III

Here, we are reviewing the Olympus E-P1 and Sony A7R III, former being a Entry-Level Mirrorless while the other is a Pro Mirrorless by brands Olympus and Sony. There is a sizable difference between the sensor resolutions of the E-P1 (12MP) and A7R III (42MP) and the E-P1 (Four Thirds) and A7R III (Full frame) offer totally different sensor size.

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The E-P1 was introduced 9 years prior to the A7R III and that is quite a significant difference as far as tech is concerned. Both the cameras feature different body design with the Olympus E-P1 being a Rangefinder-style mirrorless camera and the Sony A7R III being a SLR-style mirrorless camera.

Before delving into a in depth comparison, here is a concise view of how the E-P1 matches up versus the A7R III with regard to portability, imaging, features and an overall rating.

Following is a sample of the gallery pictures for Olympus PEN E-P1 & Sony Alpha A7R III. The whole galleries are provided at Olympus E-P1 Gallery & Sony A7R III Gallery.

For those who are planning to carry your camera often, you will have to take into account its weight and dimensions. The Olympus E-P1 has physical measurements of 121mm x 70mm x 36mm (4.8" x 2.8" x 1.4") and a weight of 355 grams (0.78 lbs) whilst the Sony A7R III has dimensions of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") along with a weight of 657 grams (1.45 lbs).

Check out the Olympus E-P1 and Sony A7R III in our completely new Camera & Lens Size Comparison Tool.

Take into consideration, the weight of an ILC will differ dependant on the lens you are utilising at the time. Following is a front view size comparison of the E-P1 versus the A7R III.

Using size and weight, the portability grade of the E-P1 and A7R III is 86 and 63 respectively.

In many cases, it is very hard to visualise the gap between sensor sizing only by reviewing specifications. The visual here will offer you a far better sense of the sensor sizing in the E-P1 and A7R III.

Plainly, the 2 cameras feature different megapixel count and different sensor sizing. The E-P1 having a tinier sensor will make getting shallower depth of field trickier and the Sony A7R III will deliver extra detail using its extra 30 Megapixels. Greater resolution can also enable you to crop photos way more aggressively. The older E-P1 is going to be disadvantaged in sensor technology.