Olympus E-M1 vs Sony A7

On this page, we will be contrasting the Olympus E-M1 vs Sony A7, both Pro Mirrorless digital cameras by manufacturers Olympus and Sony. There is a huge difference between the sensor resolutions of the E-M1 (16MP) and A7 (24MP) and the E-M1 (Four Thirds) and A7 (Full frame) boast totally different sensor sizes.

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The E-M1 was brought out 2 months prior to the A7 so they are both of a similar generation. Both of the cameras have the same body design (SLR-style mirrorless).

Before going right into a complete comparison, here is a simple summation of how the E-M1 scores vs the A7 in regards to portability, imaging, features and an overall rating.

Following is a preview of the gallery images for Olympus OM-D E-M1 and Sony Alpha A7. The entire galleries are provided at Olympus E-M1 Gallery and Sony A7 Gallery.

For anybody who is looking to carry your camera regularly, you are going to need to think about its weight and measurements. The Olympus E-M1 comes with external measurements of 130mm x 94mm x 63mm (5.1" x 3.7" x 2.5") accompanied by a weight of 497 grams (1.10 lbs) while the Sony A7 has proportions of 127mm x 94mm x 48mm (5.0" x 3.7" x 1.9") and a weight of 474 grams (1.04 lbs).

Contrast the Olympus E-M1 vs Sony A7 in the all new Camera with Lens Size Comparison Tool.

Remember that, the weight of an Interchangeable Lens Camera will vary depending on the lens you are employing during that time. Here is a front view over all size comparison of the E-M1 vs the A7.

Considering size and weight, the portability rating of the E-M1 and A7 is 71 and 78 respectively.

Often, it can be hard to envision the gap between sensor sizing merely by reviewing specifications. The graphic here will help give you a stronger sense of the sensor measurements in the E-M1 and A7.

To sum up, the 2 cameras have different resolutions and different sensor sizing. The E-M1 featuring a tinier sensor will make shooting shallow DOF harder and the Sony A7 will offer you greater detail having its extra 8 Megapixels. Higher resolution will also allow you to crop photographs a bit more aggressively.