Olympus E-M1 II vs Sony a1

In this article, we will be matching up the Olympus E-M1 II and Sony a1, both Pro Mirrorless cameras by rivals Olympus and Sony. There is a large difference among the resolutions of the E-M1 II (20MP) and a1 (50MP) and the E-M1 II (Four Thirds) and a1 (Full frame) possess different sensor sizes.

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The E-M1 II was launched 5 years prior to the a1 which is a fairly serious difference as far as camera tech is concerned. Both the cameras offer the identical body type (SLR-style mirrorless).

Before diving in to a more detailed comparison, below is a short overview of how the E-M1 II grades versus the a1 in regards to portability, imaging, features and an overall score.

This is a preview of the gallery images for Olympus OM-D E-M1 Mark II & Sony Alpha a1. The complete galleries are available at Olympus E-M1 II Gallery & Sony a1 Gallery.

If you are going to carry around your camera regularly, you'll need to consider its weight and size. The Olympus E-M1 II offers external dimensions of 134mm x 91mm x 67mm (5.3" x 3.6" x 2.6") with a weight of 574 grams (1.27 lbs) whilst the Sony a1 has specifications of 129mm x 97mm x 70mm (5.1" x 3.8" x 2.8") having a weight of 737 grams (1.62 lbs).

Check out the Olympus E-M1 II and Sony a1 in our brand new Camera plus Lens Size Comparison Tool.

Remember that, the weight of an ILC will vary depending on the lens you choose during that time. Here is the front view measurement comparison of the E-M1 II vs the a1.

Considering size and weight, the portability rating of the E-M1 II and a1 is 68 and 61 respectively.

Generally, its tough to picture the gap in sensor sizes merely by viewing specifications. The picture below will help give you a greater sense of the sensor sizes in the E-M1 II and a1.

Plainly, both the cameras enjoy different megapixels and different sensor sizes. The E-M1 II featuring a smaller sensor is going to make achieving shallow DOF tougher and the Sony a1 will provide you with extra detail utilizing its extra 30MP. Higher resolution can also allow you to crop shots far more aggressively. The more aged E-M1 II will be disadvantaged with regard to sensor tech.