Olympus E-M1 III vs Sony A300

Here, we are looking at the Olympus E-M1 III and Sony A300, former being a Pro Mirrorless while the other is a Entry-Level DSLR by companies Olympus and Sony. There exists a considerable gap among the resolutions of the E-M1 III (20MP) and A300 (10MP) and the E-M1 III (Four Thirds) and A300 (APS-C) provide different sensor sizes.

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The E-M1 III was manufactured 12 years later than the A300 and that is a fairly large difference as far as camera technology is concerned. Each of these cameras feature different body design with the Olympus E-M1 III being a SLR-style mirrorless camera and the Sony A300 being a Compact SLR camera.

Before diving into a thorough comparison, here is a short introduction of how the E-M1 III matches up against the A300 for portability, imaging, features and an overall rating.

Following is a sample of the gallery pictures for Olympus OM-D E-M1 Mark III & Sony Alpha DSLR-A300. The entire galleries are available at Olympus E-M1 III Gallery & Sony A300 Gallery.

If you are looking to carry your camera often, you will have to consider its weight and measurements. The Olympus E-M1 III provides outer measurements of 134mm x 91mm x 69mm (5.3" x 3.6" x 2.7") with a weight of 580 grams (1.28 lbs) whilst the Sony A300 has proportions of 131mm x 99mm x 75mm (5.2" x 3.9" x 3.0") along with a weight of 632 grams (1.39 lbs).

Examine the Olympus E-M1 III and Sony A300 in our newest Camera plus Lens Size Comparison Tool.

Take into account, the weight of an ILC will differ based on the lens you are using at the time. The following is a front view measurements comparison of the E-M1 III against the A300.

Looking at dimensions and weight, the portability grade of the E-M1 III and A300 is 67 and 64 respectively.

More often than not, its tough to visualize the difference in sensor sizing simply by checking out technical specs. The visual underneath might provide you a better sense of the sensor sizing in the E-M1 III and A300.

As you can tell, both of the cameras feature different resolutions and different sensor sizing. The E-M1 III featuring a smaller sensor is going to make getting bokeh harder and the Olympus E-M1 III will show extra detail due to its extra 10MP. Greater resolution will also help you crop photos way more aggressively. The younger E-M1 III provides an advantage with regard to sensor innovation.