OM System OM-1 vs Sony A7R III

Here, we are comparing the OM System OM-1 vs Sony A7R III, both Pro Mirrorless digital cameras by competitors Olympus and Sony. There is a noticeable difference between the image resolutions of the OM System OM-1 (20MP) and A7R III (42MP) and the OM System OM-1 (Four Thirds) and A7R III (Full frame) offer totally different sensor sizes.

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The OM System OM-1 was introduced 4 years later than the A7R III and that is quite a sizable difference as far as tech is concerned. Each of the cameras feature the same body design (SLR-style mirrorless).

Before we go into a in-depth comparison, here is a brief highlight of how the OM System OM-1 scores versus the A7R III in regards to portability, imaging, features and an overall rating.

This is a sample of the gallery pictures for OM System OM-1 & Sony Alpha A7R III. The whole galleries are provided at OM System OM-1 Gallery & Sony A7R III Gallery.

For anyone who is looking to carry your camera frequently, you'll have to think about its weight and size. The OM System OM-1 features external dimensions of 135mm x 92mm x 73mm (5.3" x 3.6" x 2.9") and a weight of 599 grams (1.32 lbs) and the Sony A7R III has specifications of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") accompanied by a weight of 657 grams (1.45 lbs).

Examine the OM System OM-1 vs Sony A7R III in our completely new Camera & Lens Size Comparison Tool.

Take into account, the weight of an ILC will vary dependant on the lens you select at that time. Below is a front view over all size comparison of the OM System OM-1 versus the A7R III.

Considering size and weight, the portability rating of the OM System OM-1 and A7R III is 65 and 63 respectively.

Oftentimes, it can be hard to see the difference between sensor sizing merely by checking specifications. The visual underneath will offer you a clearer sense of the sensor dimensions in the OM System OM-1 and A7R III.

Plainly, each of these cameras feature different megapixels and different sensor sizing. The OM System OM-1 with its tinier sensor will make achieving shallow depth of field tougher and the Sony A7R III will give you extra detail using its extra 22 Megapixels. Greater resolution can also help you crop pics way more aggressively. The newer OM System OM-1 will have a benefit with regard to sensor tech.