Olympus E-M1 III vs Sony FX3

In this article, we are evaluating the Olympus E-M1 III and Sony FX3, both Pro Mirrorless cameras by brands Olympus and Sony. There exists a sizeable gap among the resolutions of the E-M1 III (20MP) and FX3 (12MP) and the E-M1 III (Four Thirds) and FX3 (Full frame) feature different sensor sizes.

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The E-M1 III was revealed 12 months earlier than the FX3 which means that they are both of a similar generation. The two cameras offer different body type with the Olympus E-M1 III being a SLR-style mirrorless camera and the Sony FX3 being a Rangefinder-style mirrorless camera.

Before getting straight into a full comparison, below is a concise overview of how the E-M1 III matches up vs the FX3 with regards to portability, imaging, features and an overall rating.

The following is a sample of the gallery pics for Olympus OM-D E-M1 Mark III and Sony FX3. The full galleries are available at Olympus E-M1 III Gallery and Sony FX3 Gallery.

For those who are looking to carry your camera frequently, you are going to need to take into account its weight and measurements. The Olympus E-M1 III comes with outside dimensions of 134mm x 91mm x 69mm (5.3" x 3.6" x 2.7") along with a weight of 580 grams (1.28 lbs) and the Sony FX3 has proportions of 130mm x 78mm x 85mm (5.1" x 3.1" x 3.3") with a weight of 716 grams (1.58 lbs).

See the Olympus E-M1 III and Sony FX3 in the latest Camera with Lens Size Comparison Tool.

Do not forget, the weight of an Interchangeable Lens Camera will differ dependant on the lens you have attached during that time. The following is the front view proportions comparison of the E-M1 III versus the FX3.

Taking into consideration dimensions and weight, the portability rating of the E-M1 III and FX3 is 67 and 62 respectively.

Quite often, its tough to visualize the gap in sensor sizing only by looking through technical specs. The visual underneath will help give you a clearer sense of the sensor dimensions in the E-M1 III and FX3.

As you can tell, the two cameras offer different megapixels and different sensor sizing. The E-M1 III having a smaller sensor is going to make getting shallower depth of field more difficult and the Olympus E-M1 III will provide you with extra detail because of its extra 8 Megapixels. Greater resolution will also make it easier to crop pics a little more aggressively. The older E-M1 III will be disadvantaged when it comes to sensor technology.