Olympus E-400 vs Sony A7R III

The following is a in-depth analysis of the Olympus E-400 versus Sony A7R III, one is a Entry-Level DSLR and the latter is a Pro Mirrorless by companies Olympus and Sony. There is a significant difference between the resolutions of the E-400 (10MP) and A7R III (42MP) and the E-400 (Four Thirds) and A7R III (Full frame) have totally different sensor dimensions.

Photography Glossary

The E-400 was unveiled 12 years before the A7R III which is quite a sizable gap as far as tech is concerned. Both of the cameras feature different body design with the Olympus E-400 being a Compact SLR camera and the Sony A7R III being a SLR-style mirrorless camera.

Before getting into a more detailed comparison, here is a brief highlight of how the E-400 matches up vs the A7R III with regard to portability, imaging, features and an overall mark.

Below is a preview of the gallery photos for Olympus E-400 and Sony Alpha A7R III. The full galleries are available at Olympus E-400 Gallery and Sony A7R III Gallery.

For anyone who is looking to travel with your camera, you're going to have to take into account its weight and volume. The Olympus E-400 comes with external dimensions of 130mm x 91mm x 53mm (5.1" x 3.6" x 2.1") accompanied by a weight of 435 grams (0.96 lbs) while the Sony A7R III has sizing of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") along with a weight of 657 grams (1.45 lbs).

Examine the Olympus E-400 versus Sony A7R III in the all new Camera and Lens Size Comparison Tool.

Take into consideration, the weight of an Interchangeable Lens Camera will vary based on the lens you select at that moment. Here is a front view measurements comparison of the E-400 and the A7R III.

Using size and weight, the portability score of the E-400 and A7R III is 77 and 63 respectively.

Oftentimes, its hard to visualise the contrast between sensor dimensions just by reading through specifications. The image below will help give you a greater sense of the sensor sizes in the E-400 and A7R III.

Plainly, the two cameras come with different megapixel count and different sensor dimensions. The E-400 having a tinier sensor will make shooting shallow DOF trickier and the Sony A7R III will resolve greater detail having an extra 32MP. Higher resolution will allow you to crop shots a good deal more aggressively. The more aged E-400 is going to be disadvantaged with regard to sensor tech.