Olympus E-M10 vs Sony A100

Following is a in-depth review of the Olympus E-M10 and Sony A100, former is a Entry-Level Mirrorless while the other is a Entry-Level DSLR by companies Olympus and Sony. There is a considerable difference among the image resolutions of the E-M10 (16MP) and A100 (10MP) and the E-M10 (Four Thirds) and A100 (APS-C) have totally different sensor dimensions.

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The E-M10 was released 7 years after the A100 which is a fairly large difference as far as camera tech is concerned. Each of the cameras feature different body design with the Olympus E-M10 being a SLR-style mirrorless camera and the Sony A100 being a Compact SLR camera.

Before diving right into a more detailed comparison, here is a quick view of how the E-M10 scores versus the A100 in relation to portability, imaging, features and an overall score.

Here is a sample of the gallery pictures for Olympus OM-D E-M10 & Sony Alpha DSLR-A100. The complete galleries are provided at Olympus E-M10 Gallery & Sony A100 Gallery.

For anyone who is aiming to carry around your camera frequently, you will want to take into account its weight and size. The Olympus E-M10 provides external measurements of 119mm x 82mm x 46mm (4.7" x 3.2" x 1.8") having a weight of 396 grams (0.87 lbs) and the Sony A100 has specifications of 133mm x 95mm x 71mm (5.2" x 3.7" x 2.8") and a weight of 638 grams (1.41 lbs).

Examine the Olympus E-M10 and Sony A100 in our completely new Camera plus Lens Size Comparison Tool.

Remember that, the weight of an ILC will vary based on the lens you have chosen at that time. Below is a front view dimension comparison of the E-M10 against the A100.

Taking into account size and weight, the portability rating of the E-M10 and A100 is 82 and 64 respectively.

Usually, it's hard to envision the difference in sensor sizes simply by going through technical specs. The picture here should give you a clearer sense of the sensor measurements in the E-M10 and A100.

As you have seen, the 2 cameras come with different megapixels and different sensor sizes. The E-M10 due to its smaller sensor will make achieving shallower depth of field more difficult and the Olympus E-M10 will produce more detail as a result of its extra 6MP. Greater resolution can also let you crop pics a good deal more aggressively. The more recent E-M10 is going to have an advantage in sensor tech.