OM System OM-1 vs Olympus E-M1 III

In this write-up, we are looking at the OM System OM-1 vs Olympus E-M1 III, both Pro Mirrorless digital cameras and they are both produced by Olympus. The resolution of the OM System OM-1 (20MP) and the E-M1 III (20MP) is fairly well matched and they possess the same exact sensor sizing (Four Thirds).

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The OM System OM-1 was revealed 2 years later than the E-M1 III and that is quite a sizable gap as far as technology is concerned. Both the cameras offer the identical body type (SLR-style mirrorless).

Before going straight into a in depth comparison, below is a brief synopsis of how the OM System OM-1 matches up versus the E-M1 III with regard to portability, imaging, features and an overall rating.

The following is a sample of the gallery pictures for OM System OM-1 and Olympus OM-D E-M1 Mark III. The full galleries are available at OM System OM-1 Gallery and Olympus E-M1 III Gallery.

When you are intending to carry your camera, you're going to have to factor its weight and volume. The OM System OM-1 has got physical dimensions of 135mm x 92mm x 73mm (5.3" x 3.6" x 2.9") with a weight of 599 grams (1.32 lbs) and the Olympus E-M1 III has sizing of 134mm x 91mm x 69mm (5.3" x 3.6" x 2.7") having a weight of 580 grams (1.28 lbs).

Examine the OM System OM-1 vs Olympus E-M1 III in the latest Camera and Lens Size Comparison Tool.

Don't forget, the weight of an Interchangeable Lens Camera will vary depending on the lens you have attached at that moment. Here is the front view measurement comparison of the OM System OM-1 compared to the E-M1 III.

Considering dimensions and weight, the portability grade of the OM System OM-1 and E-M1 III is 65 and 67 respectively.

Typically, it's hard to visualize the contrast between sensor sizing simply by checking technical specs. The graphic underneath might offer you a better sense of the sensor dimensions in the OM System OM-1 and E-M1 III.

As you have seen, both of those cameras enjoy the same exact sensor sizing and the identical MP and you should expect similar quality of pictures although you should really take the production date of the products into consideration. The newer OM System OM-1 should have an advantage with regard to sensor innovation.