Nikon D5100 vs Olympus E-M1 III

Lets look much closer at the Nikon D5100 vs Olympus E-M1 III, one being a Entry-Level DSLR and the other is a Pro Mirrorless by competitors Nikon and Olympus. The sensor resolution of the D5100 (16MP) and the E-M1 III (20MP) is very similar but the D5100 (APS-C) and E-M1 III (Four Thirds) have different sensor sizing.

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The D5100 was manufactured 9 years earlier than the E-M1 III and that is quite a large gap as far as technology is concerned. Both of these cameras feature different body design with the Nikon D5100 being a Compact SLR camera and the Olympus E-M1 III being a SLR-style mirrorless camera.

Before delving right into a detailed comparison, here is a quick view of how the D5100 scores vs the E-M1 III for portability, imaging, features and an overall rating.

Following is a sample of the gallery pics for Nikon D5100 and Olympus OM-D E-M1 Mark III. The entire galleries are provided at Nikon D5100 Gallery and Olympus E-M1 III Gallery.

In case you're intending to carry your camera, you will want to consider its weight and proportions. The Nikon D5100 enjoys outside dimensions of 128mm x 97mm x 79mm (5.0" x 3.8" x 3.1") with a weight of 560 grams (1.23 lbs) and the Olympus E-M1 III has measurements of 134mm x 91mm x 69mm (5.3" x 3.6" x 2.7") with a weight of 580 grams (1.28 lbs).

Examine the Nikon D5100 vs Olympus E-M1 III in the latest Camera and Lens Size Comparison Tool.

Do not forget, the weight of an Interchangeable Lens Camera will change depending on the lens you use at that moment. Below is a front view over all size comparison of the D5100 and the E-M1 III.

Considering dimensions and weight, the portability score of the D5100 and E-M1 III is 66 and 67 respectively.

Quite often, its hard to visualize the contrast between sensor sizing merely by going over a spec sheet. The graphic below will provide you a stronger sense of the sensor dimensions in the D5100 and E-M1 III.

Clearly, both of the cameras feature different megapixel count and different sensor sizing. The D5100 featuring a larger sensor is going to make achieving bokeh simpler and the Olympus E-M1 III will deliver extra detail due to its extra 4MP. Greater resolution will let you crop photos way more aggressively. The older D5100 is going to be behind in sensor technology.