OM System OM-1 vs Sony A7R II

Here is a complete comparison of the OM System OM-1 and Sony A7R II, both Pro Mirrorless digital cameras by brands Olympus and Sony. There exists a noticeable gap between the resolutions of the OM System OM-1 (20MP) and A7R II (42MP) and the OM System OM-1 (Four Thirds) and A7R II (Full frame) have different sensor dimensions.

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The OM System OM-1 was unveiled 6 years later than the A7R II and that is quite a sizable difference as far as technology is concerned. The two cameras feature the same body design (SLR-style mirrorless).

Before getting right into a in-depth comparison, here is a short highlight of how the OM System OM-1 grades vs the A7R II in regards to portability, imaging, features and an overall rating.

The following is a preview of the gallery images for OM System OM-1 & Sony Alpha A7R II. The full galleries are available at OM System OM-1 Gallery & Sony A7R II Gallery.

For anyone who is intending to carry your camera frequently, you will need to factor in its weight and dimensions. The OM System OM-1 has got physical dimensions of 135mm x 92mm x 73mm (5.3" x 3.6" x 2.9") and a weight of 599 grams (1.32 lbs) whilst the Sony A7R II has dimensions of 127mm x 96mm x 60mm (5.0" x 3.8" x 2.4") and a weight of 625 grams (1.38 lbs).

Check out the OM System OM-1 and Sony A7R II in our newest Camera & Lens Size Comparison Tool.

Bear in mind, the weight of an ILC will change depending on the lens you are using at that time. The following is a front view size comparison of the OM System OM-1 against the A7R II.

Taking into account dimensions and weight, the portability score of the OM System OM-1 and A7R II is 65 and 68 respectively.

Typically, it is tough to picture the contrast between sensor sizing only by looking at specs. The graphic below may offer you a greater sense of the sensor dimensions in the OM System OM-1 and A7R II.

All in all, the 2 cameras come with different megapixels and different sensor sizing. The OM System OM-1 having a tinier sensor is going to make achieving shallow DOF tougher and the Sony A7R II will resolve more detail having an extra 22MP. Higher resolution will also make it easier to crop photographs a good deal more aggressively. The younger OM System OM-1 should have an advantage in sensor technology.