Olympus E-420 vs Sony A7R III

Here is a in-depth overview of the Olympus E-420 vs Sony A7R III, former being a Entry-Level DSLR while the latter is a Pro Mirrorless by competitors Olympus and Sony. There is a substantial difference between the sensor resolutions of the E-420 (10MP) and A7R III (42MP) and the E-420 (Four Thirds) and A7R III (Full frame) possess totally different sensor dimensions.

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The E-420 was revealed 10 years prior to the A7R III and that is quite a big difference as far as tech is concerned. The two cameras come with different body type with the Olympus E-420 being a Compact SLR camera and the Sony A7R III being a SLR-style mirrorless camera.

Before getting through a comprehensive comparison, below is a brief summation of how the E-420 grades against the A7R III when it comes to portability, imaging, features and an overall rating.

Here is a preview of the gallery images for Olympus E-420 & Sony Alpha A7R III. The full galleries are provided at Olympus E-420 Gallery & Sony A7R III Gallery.

If you're intending to carry your camera often, you have to take into account its weight and size. The Olympus E-420 has got outer dimensions of 130mm x 91mm x 53mm (5.1" x 3.6" x 2.1") accompanied by a weight of 426 grams (0.94 lbs) and the Sony A7R III has specifications of 127mm x 96mm x 74mm (5.0" x 3.8" x 2.9") having a weight of 657 grams (1.45 lbs).

Check out the Olympus E-420 vs Sony A7R III in our newest Camera plus Lens Size Comparison Tool.

Always remember, the weight of an ILC will differ based on the lens you use at that moment. Following is the front view measurements comparison of the E-420 versus the A7R III.

Looking at size and weight, the portability rating of the E-420 and A7R III is 77 and 63 respectively.

Usually, it can be hard to envision the difference between sensor sizing just by reading a spec sheet. The photograph here might offer you a stronger sense of the sensor dimensions in the E-420 and A7R III.

As you can see, both of those cameras posses different megapixel count and different sensor sizing. The E-420 having a tinier sensor will make shooting shallower depth of field harder and the Sony A7R III will offer you extra detail because of its extra 32MP. Higher resolution can also let you crop pictures somewhat more aggressively. The older E-420 is going to be disadvantaged with regard to sensor technology.