Olympus E-P3 vs Sony A7 III

Below, we will be contrasting the Olympus E-P3 vs Sony A7 III, former being a Entry-Level Mirrorless while the latter is a Pro Mirrorless by companies Olympus and Sony. There is a large difference between the image resolutions of the E-P3 (12MP) and A7 III (24MP) and the E-P3 (Four Thirds) and A7 III (Full frame) use different sensor dimensions.

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The E-P3 was released 7 years earlier than the A7 III and that is quite a serious difference as far as tech is concerned. Both the cameras come with different body type with the Olympus E-P3 being a Rangefinder-style mirrorless camera and the Sony A7 III being a SLR-style mirrorless camera.

Before delving in to a step-by-step comparison, below is a short overview of how the E-P3 grades against the A7 III in the way of portability, imaging, features and an overall grade.

The following is a preview of the gallery photos for Olympus PEN E-P3 & Sony Alpha A7 III. The complete galleries are provided at Olympus E-P3 Gallery & Sony A7 III Gallery.

If you are going to lug around your camera regularly, you are going to need to think about its weight and size. The Olympus E-P3 offers exterior dimensions of 122mm x 69mm x 34mm (4.8" x 2.7" x 1.3") having a weight of 369 grams (0.81 lbs) and the Sony A7 III has specifications of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") accompanied by a weight of 650 grams (1.43 lbs).

Look at the Olympus E-P3 vs Sony A7 III in our newest Camera plus Lens Size Comparison Tool.

Always remember, the weight of an ILC will change based on the lens you are employing at the time. Below is the front view size comparison of the E-P3 versus the A7 III.

Considering size and weight, the portability rating of the E-P3 and A7 III is 86 and 63 respectively.

Generally, its difficult to picture the contrast between sensor measurements simply by reviewing technical specs. The graphic below will provide you a more clear sense of the sensor dimensions in the E-P3 and A7 III.

As you have seen, both the cameras posses different megapixel count and different sensor measurements. The E-P3 because of its tinier sensor is going to make shooting shallower DOF trickier and the Sony A7 III will offer greater detail as a result of its extra 12 Megapixels. Higher resolution will also enable you to crop photographs somewhat more aggressively. The older E-P3 is going to be disadvantaged in sensor tech.