Olympus E-M1 III vs Panasonic GX1

On this page, we will be reviewing the Olympus E-M1 III and Panasonic GX1, one is a Pro Mirrorless and the latter is a Entry-Level Mirrorless by competitors Olympus and Panasonic. There exists a significant gap among the image resolutions of the E-M1 III (20MP) and GX1 (16MP) but both cameras offer the same sensor sizes (Four Thirds).

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The E-M1 III was announced 8 years after the GX1 which is a fairly sizable gap as far as camera technology is concerned. Each of the cameras have different body design with the Olympus E-M1 III being a SLR-style mirrorless camera and the Panasonic GX1 being a Rangefinder-style mirrorless camera.

Before delving straight to a complete comparison, here is a quick introduction of how the E-M1 III scores vs the GX1 with regard to portability, imaging, features and an overall score.

Following is a preview of the gallery images for Olympus OM-D E-M1 Mark III and Panasonic Lumix DMC-GX1. The whole galleries are provided at Olympus E-M1 III Gallery and Panasonic GX1 Gallery.

For anybody who is aiming to carry around your camera often, you'll have to consider its weight and measurements. The Olympus E-M1 III offers physical measurements of 134mm x 91mm x 69mm (5.3" x 3.6" x 2.7") accompanied by a weight of 580 grams (1.28 lbs) while the Panasonic GX1 has proportions of 116mm x 68mm x 39mm (4.6" x 2.7" x 1.5") with a weight of 318 grams (0.70 lbs).

See the Olympus E-M1 III and Panasonic GX1 in the all new Camera with Lens Size Comparison Tool.

Always remember, the weight of an Interchangeable Lens Camera will vary based on the lens you are utilising at the time. Underneath is a front view overall size comparison of the E-M1 III and the GX1.

Using dimensions and weight, the portability score of the E-M1 III and GX1 is 67 and 87 respectively.

More often than not, it can be hard to visualize the gap in sensor sizes purely by looking through specs. The image below should offer you a more clear sense of the sensor measurements in the E-M1 III and GX1.

As you can plainly see, both the cameras provide the same sensor dimensions albeit different MP. You should expect the Olympus E-M1 III to result in more detail with its extra 4MP. Higher resolution will allow you to crop shots more aggressively. The younger E-M1 III provides a benefit when it comes to sensor technology.