OM System OM-1 vs Sony A7R IV

The following is a complete overview of the OM System OM-1 and Sony A7R IV, both Pro Mirrorless cameras by rivals Olympus and Sony. There exists a large gap among the image resolutions of the OM System OM-1 (20MP) and A7R IV (61MP) and the OM System OM-1 (Four Thirds) and A7R IV (Full frame) come with different sensor dimensions.

Photography Glossary

The OM System OM-1 was brought out 2 years after the A7R IV which is a fairly serious difference as far as camera technology is concerned. Both of these cameras offer the identical body type (SLR-style mirrorless).

Before we go in to a step-by-step comparison, below is a quick introduction of how the OM System OM-1 scores versus the A7R IV with regards to portability, imaging, features and an overall mark.

Here is a preview of the gallery photos for OM System OM-1 & Sony Alpha A7R IV. The entire galleries are available at OM System OM-1 Gallery & Sony A7R IV Gallery.

If you're intending to travel with your camera frequently, you have to think about its weight and size. The OM System OM-1 comes with outer measurements 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 Sony A7R IV has specifications of 129mm x 96mm x 78mm (5.1" x 3.8" x 3.1") along with a weight of 665 grams (1.47 lbs).

Contrast the OM System OM-1 and Sony A7R IV in our completely new Camera plus Lens Size Comparison Tool.

Remember that, the weight of an ILC will change depending on the lens you have at that time. Below is the front view overall size comparison of the OM System OM-1 vs the A7R IV.

Looking at dimensions and weight, the portability score of the OM System OM-1 and A7R IV is 65 and 62 respectively.

Quite often, its hard to picture the contrast in sensor dimensions just by checking out specs. The pic underneath should offer you a much better sense of the sensor sizing in the OM System OM-1 and A7R IV.

As you can plainly see, both cameras enjoy different megapixels and different sensor dimensions. The OM System OM-1 due to its smaller sensor is going to make shooting bokeh more challenging and the Sony A7R IV will provide extra detail having its extra 41 Megapixels. Higher resolution will also make it easier to crop pictures far more aggressively. The more recent OM System OM-1 should have a benefit with regard to sensor tech.