Olympus E-M1 III vs Sony A900

On this page, we are contrasting the Olympus E-M1 III versus Sony A900, former is a Pro Mirrorless while the other is a Advanced DSLR by rivals Olympus and Sony. The image resolution of the E-M1 III (20MP) and the A900 (25MP) is very similar but the E-M1 III (Four Thirds) and A900 (Full frame) posses totally different sensor measurements.

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The E-M1 III was revealed 11 years after the A900 which is quite a sizable difference as far as technology is concerned. The two cameras have different body design with the Olympus E-M1 III being a SLR-style mirrorless camera and the Sony A900 being a Mid-size SLR camera.

Before delving into a in-depth comparison, here is a concise view of how the E-M1 III matches up vs the A900 in terms of portability, imaging, features and an overall score.

This is a sample of the gallery pics for Olympus OM-D E-M1 Mark III & Sony Alpha DSLR-A900. The full galleries are viewable at Olympus E-M1 III Gallery & Sony A900 Gallery.

When you are intending to carry around your camera, you will want to factor its weight and proportions. The Olympus E-M1 III has got exterior dimensions of 134mm x 91mm x 69mm (5.3" x 3.6" x 2.7") with a weight of 580 grams (1.28 lbs) and the Sony A900 has measurements of 156mm x 117mm x 82mm (6.1" x 4.6" x 3.2") accompanied by a weight of 895 grams (1.97 lbs).

Analyze the Olympus E-M1 III versus Sony A900 in our completely new Camera & Lens Size Comparison Tool.

Always remember, the weight of an ILC will change dependant on the lens you select at that time. Below is a front view size comparison of the E-M1 III compared to the A900.

Using dimensions and weight, the portability grade of the E-M1 III and A900 is 67 and 54 respectively.

More often than not, its hard to see the gap between sensor sizes purely by reviewing a spec sheet. The image below may offer you a more clear sense of the sensor dimensions in the E-M1 III and A900.

As you can see, both of the cameras provide different megapixel count and different sensor sizes. The E-M1 III with its tinier sensor will make getting shallower depth of field more difficult and the Sony A900 will deliver more detail because of its extra 5MP. Greater resolution will also make it easier to crop photos more aggressively. The fresher E-M1 III is going to have an edge when it comes to sensor innovation.