Olympus E-M10 III vs Sony A7 IV

In this article, we are looking at the Olympus E-M10 III vs Sony A7 IV, former being a Entry-Level Mirrorless while the other is a Pro Mirrorless by manufacturers Olympus and Sony. There exists a considerable gap among the resolutions of the E-M10 III (16MP) and A7 IV (33MP) and the E-M10 III (Four Thirds) and A7 IV (Full frame) feature different sensor size.

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The E-M10 III was revealed 5 years before the A7 IV and that is a fairly large difference as far as camera technology is concerned. Each of these cameras offer the identical body type (SLR-style mirrorless).

Before we go through a in depth comparison, below is a short summation of how the E-M10 III matches up versus the A7 IV with regard to portability, imaging, features and an overall rating.

Below is a sample of the gallery pictures for Olympus OM-D E-M10 Mark III & Sony Alpha A7 IV. The full galleries are provided at Olympus E-M10 III Gallery & Sony A7 IV Gallery.

When you are looking to carry your camera often, you will have to factor in its weight and volume. The Olympus E-M10 III provides outer dimensions of 122mm x 84mm x 50mm (4.8" x 3.3" x 2.0") accompanied by a weight of 410 grams (0.90 lbs) whilst the Sony A7 IV has sizing of 129mm x 97mm x 81mm (5.1" x 3.8" x 3.2") and a weight of 699 grams (1.54 lbs).

Take a look at the Olympus E-M10 III vs Sony A7 IV in our completely new Camera plus Lens Size Comparison Tool.

Don't forget, the weight of an ILC will differ dependant on the lens you use at the time. The following is the front view size comparison of the E-M10 III compared to the A7 IV.

Considering dimensions and weight, the portability rating of the E-M10 III and A7 IV is 80 and 61 respectively.

More often than not, it's difficult to picture the gap in sensor sizing just by looking through technical specs. The graphic here might offer you a better sense of the sensor dimensions in the E-M10 III and A7 IV.

As you have seen, each of these cameras enjoy different megapixel count and different sensor sizing. The E-M10 III using its smaller sensor is going to make achieving shallow depth of field more difficult and the Sony A7 IV will provide you with extra detail because of its extra 17 Megapixels. Greater resolution can also enable you to crop photos far more aggressively. The older E-M10 III will be disadvantaged in sensor innovation.