OM System OM-5 vs Sony A7S III

On this page, we will be looking at the OM System OM-5 versus Sony A7S III, former is a Advanced Mirrorless while the latter is a Pro Mirrorless by manufacturers Olympus and Sony. There exists a considerable gap among the image resolutions of the OM System OM-5 (20MP) and A7S III (12MP) and the OM System OM-5 (Four Thirds) and A7S III (Full frame) posses different sensor size.

Japan-exclusive Leica Leitz Phone 3 features big sensor and new modes

The OM System OM-5 was manufactured 2 years after the A7S III which is a fairly large difference as far as camera technology is concerned. Each of the cameras have the same body design (SLR-style mirrorless).

Before we go into a more detailed comparison, here is a simple highlight of how the OM System OM-5 scores vs the A7S III in terms of portability, imaging, features and an overall score.

This is a preview of the gallery images for OM System OM-5 & Sony Alpha A7S III. The entire galleries are provided at OM System OM-5 Gallery & Sony A7S III Gallery.

In case you're going to carry around your camera regularly, you will want to consider its weight and size. The OM System OM-5 has got physical measurements of 125mm x 85mm x 50mm (4.9" x 3.3" x 2.0") with a weight of 414 grams (0.91 lbs) whilst the Sony A7S III has specifications of 129mm x 97mm x 81mm (5.1" x 3.8" x 3.2") having a weight of 699 grams (1.54 lbs).

Take a look at the OM System OM-5 versus Sony A7S III in our completely new Camera & Lens Size Comparison Tool.

Bear in mind, the weight of an ILC will differ based on the lens you are utilizing during that time. Underneath is a front view sizing comparison of the OM System OM-5 compared to the A7S III.

Taking into account dimensions and weight, the portability rating of the OM System OM-5 and A7S III is 80 and 61 respectively.

Normally, it can be difficult to visualize the contrast in sensor sizes only by going through specifications. The image here may provide you a greater sense of the sensor sizing in the OM System OM-5 and A7S III.

To sum up, the two cameras have different megapixels and different sensor sizes. The OM System OM-5 due to its smaller sensor is going to make shooting shallow depth of field harder and the OM System OM-5 will show greater detail due to its extra 8MP. Higher resolution can also make it easier to crop pictures a bit more aggressively. The more recent OM System OM-5 should have an edge in sensor innovation.