Olympus E-M1 III vs Sony RX100

On this page, we are reviewing the Olympus E-M1 III versus Sony RX100, former being a Pro Mirrorless while the other is a Large Sensor Compact by companies Olympus and Sony. The resolution of the E-M1 III (20MP) and the RX100 (20MP) is very close but the E-M1 III (Four Thirds) and RX100 (1") provide totally different sensor measurements.

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The E-M1 III was revealed 7 years later than the RX100 and that is a fairly big difference as far as camera technology is concerned. Both cameras have different body design with the Olympus E-M1 III being a SLR-style mirrorless camera and the Sony RX100 being a Large Sensor Compact camera.

Before delving into a comprehensive comparison, here is a simple summary of how the E-M1 III scores vs the RX100 with regards to portability, imaging, features and an overall rating.

This is a sample of the gallery pics for Olympus OM-D E-M1 Mark III & Sony Cyber-shot DSC-RX100. The full galleries are available at Olympus E-M1 III Gallery & Sony RX100 Gallery.

For anybody who is going to carry your camera, you're going to have to think about its weight and size. The Olympus E-M1 III offers exterior measurements of 134mm x 91mm x 69mm (5.3" x 3.6" x 2.7") having a weight of 580 grams (1.28 lbs) whilst the Sony RX100 has specifications of 102mm x 58mm x 36mm (4.0" x 2.3" x 1.4") having a weight of 240 grams (0.53 lbs).

Check the Olympus E-M1 III versus Sony RX100 in our completely new Camera & Lens Size Comparison Tool.

Take into consideration, the weight of an ILC will change depending on the lens you are employing during that time. Following is a front view proportions comparison of the E-M1 III and the RX100.

Taking into consideration dimensions and weight, the portability score of the E-M1 III and RX100 is 67 and 91 respectively.

Typically, it's hard to visualise the difference in sensor sizing just by viewing specs. The photograph below will help offer you a greater sense of the sensor measurements in the E-M1 III and RX100.

All in all, each of the cameras have the same megapixel count but not the same sensor sizing. The E-M1 III includes the larger sensor which will make achieving shallower DOF simpler. The fresher E-M1 III will have an edge with regard to sensor innovation.