Olympus E-M10 vs Sony A77

Below is a extensive overview of the Olympus E-M10 vs Sony A77, former being a Entry-Level Mirrorless while the latter is a Advanced DSLR by competitors Olympus and Sony. There is a considerable difference between the sensor resolutions of the E-M10 (16MP) and A77 (24MP) and the E-M10 (Four Thirds) and A77 (APS-C) come with different sensor sizes.

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The E-M10 was revealed 2 years later than the A77 and that is quite a large difference as far as tech is concerned. Both cameras offer different body type with the Olympus E-M10 being a SLR-style mirrorless camera and the Sony A77 being a Mid-size SLR camera.

Before delving straight into a comprehensive comparison, below is a short view of how the E-M10 grades against the A77 when it comes to portability, imaging, features and an overall grade.

The following is a preview of the gallery images for Olympus OM-D E-M10 & Sony SLT-A77. The full galleries are viewable at Olympus E-M10 Gallery & Sony A77 Gallery.

If you're looking to lug around your camera frequently, you have to factor its weight and volume. The Olympus E-M10 comes with outside dimensions of 119mm x 82mm x 46mm (4.7" x 3.2" x 1.8") and a weight of 396 grams (0.87 lbs) and the Sony A77 has sizing of 143mm x 104mm x 81mm (5.6" x 4.1" x 3.2") with a weight of 732 grams (1.61 lbs).

See the Olympus E-M10 vs Sony A77 in our brand new Camera & Lens Size Comparison Tool.

Remember, the weight of an ILC will differ dependant on the lens you are employing at the time. Following is the front view measurements comparison of the E-M10 compared to the A77.

Considering size and weight, the portability rating of the E-M10 and A77 is 82 and 59 respectively.

Often, it can be tough to picture the difference between sensor measurements purely by reviewing a spec sheet. The photograph below will offer you a more clear sense of the sensor sizes in the E-M10 and A77.

Clearly, the 2 cameras enjoy different resolutions and different sensor measurements. The E-M10 having a tinier sensor is going to make achieving shallow DOF trickier and the Sony A77 will offer you extra detail because of its extra 8 Megapixels. Higher resolution will help you crop photographs far more aggressively. The newer E-M10 should have an advantage when it comes to sensor innovation.