Olympus E-M10 IV vs Sony A9

Here, we will be comparing the Olympus E-M10 IV and Sony A9, one being a Entry-Level Mirrorless and the latter is a Pro Mirrorless by rivals Olympus and Sony. The sensor resolution of the E-M10 IV (20MP) and the A9 (24MP) is relatively well matched but the E-M10 IV (Four Thirds) and A9 (Full frame) have different sensor sizes.

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The E-M10 IV was announced 3 years later than the A9 and that is quite a large gap as far as technology is concerned. Both the cameras feature the same body design (SLR-style mirrorless).

Before going straight to a detailed comparison, here is a quick highlight of how the E-M10 IV matches up vs the A9 in regards to portability, imaging, features and an overall rating.

Here is a preview of the gallery photos for Olympus OM-D E-M10 IV and Sony Alpha A9. The whole galleries are available at Olympus E-M10 IV Gallery and Sony A9 Gallery.

For anybody who is planning to carry your camera, you're going to have to factor its weight and dimensions. The Olympus E-M10 IV offers external measurements of 122mm x 84mm x 49mm (4.8" x 3.3" x 1.9") along with a weight of 383 grams (0.84 lbs) whilst the Sony A9 has dimensions of 127mm x 96mm x 63mm (5.0" x 3.8" x 2.5") accompanied by a weight of 673 grams (1.48 lbs).

Examine the Olympus E-M10 IV and Sony A9 in the latest Camera and Lens Size Comparison Tool.

Remember that, the weight of an Interchangeable Lens Camera will differ dependant on the lens you select during that time. Here is a front view sizing comparison of the E-M10 IV against the A9.

Looking at dimensions and weight, the portability score of the E-M10 IV and A9 is 81 and 65 respectively.

Typically, it's hard to visualize the gap between sensor sizing just by looking at specifications. The visual here will help give you a far better sense of the sensor measurements in the E-M10 IV and A9.

Plainly, both the cameras feature different megapixel count and different sensor sizing. The E-M10 IV having a tinier sensor is going to make getting shallower DOF more difficult and the Sony A9 will give greater detail with its extra 4MP. Higher resolution will also let you crop photographs way more aggressively. The more recent E-M10 IV provides a benefit with regard to sensor tech.