Olympus E-PM1 vs Sony A7R III

Below, we are matching up the Olympus E-PM1 vs Sony A7R III, former is a Entry-Level Mirrorless while the other is a Pro Mirrorless by competitors Olympus and Sony. There is a considerable difference among the image resolutions of the E-PM1 (12MP) and A7R III (42MP) and the E-PM1 (Four Thirds) and A7R III (Full frame) come with different sensor measurements.

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The E-PM1 was revealed 7 years before the A7R III which is a fairly large difference as far as camera tech is concerned. Each of these cameras come with different body type with the Olympus E-PM1 being a Rangefinder-style mirrorless camera and the Sony A7R III being a SLR-style mirrorless camera.

Before delving through a step-by-step comparison, below is a simple summation of how the E-PM1 matches up against the A7R III in regards to portability, imaging, features and an overall mark.

This is a sample of the gallery pictures for Olympus PEN E-PM1 & Sony Alpha A7R III. The full galleries are provided at Olympus E-PM1 Gallery & Sony A7R III Gallery.

When you are aiming to travel with your camera, you will have to consider its weight and measurements. The Olympus E-PM1 provides outer measurements of 110mm x 64mm x 34mm (4.3" x 2.5" x 1.3") having a weight of 265 grams (0.58 lbs) whilst the Sony A7R III has proportions of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") accompanied by a weight of 657 grams (1.45 lbs).

Analyze the Olympus E-PM1 vs Sony A7R III in our brand new Camera plus Lens Size Comparison Tool.

Don't forget, the weight of an ILC will change depending on the lens you are utilising at that time. Here is the front view physical size comparison of the E-PM1 compared to the A7R III.

Using size and weight, the portability grade of the E-PM1 and A7R III is 89 and 63 respectively.

Usually, it is tough to picture the contrast in sensor dimensions purely by viewing specifications. The image underneath should provide you a clearer sense of the sensor sizing in the E-PM1 and A7R III.

Plainly, both cameras posses different megapixels and different sensor dimensions. The E-PM1 using its smaller sensor is going to make achieving shallow DOF more difficult and the Sony A7R III will result in more detail because of its extra 30 Megapixels. Greater resolution will also enable you to crop images somewhat more aggressively. The more aged E-PM1 will be disadvantaged with regard to sensor technology.