Size and weight are big decision factors when you are trying to find the ideal camera for your needs.
In this section, we are going to illustrate the Panasonic GH3 and Olympus E-M1X side-by-side from the front, back and top in their relative dimensions. Panasonic GH3 has external dimensions of 133 x 93 x 82 mm (5.24 x 3.66 x 3.23″) and weighs 550 g (1.21 lb / 19.40 oz) (including batteries). Olympus E-M1X has external dimensions of 144 x 147 x 75 mm (5.67 x 5.79 x 2.95″) and weighs 997 g (2.20 lb / 35.17 oz) (including batteries).
Below you can see the front-view size comparison of the Panasonic GH3 and the Olympus E-M1X. Panasonic GH3 is 11mm narrower and 54mm shorter than Olympus E-M1X but it is also 7mm thicker.
Here is the back view size comparison of the Panasonic GH3 and Olympus E-M1X.
Now lets look at the top view comparison of Panasonic GH3 and Olympus E-M1X.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Panasonic GH3 is significantly lighter (447g ) than the Olympus E-M1X which may become a big advantage especially on long walking trips.
Also keep in mind that body weight is not the only deciding factor when comparing two interchangeable camera bodies, you also have to take into account the lenses that you will be using with these bodies. Since both Panasonic GH3 and Olympus E-M1X have the same Micro Four Thirds lens mount and Four Thirds sized sensors, lenses will not be a differentiator on total size of the system.
Weather Sealing
Both the GH3 and the E-M1X have weather sealings in their bodies, making them resistant to water and dust.
LCD Screen Size and Features
Panasonic GH3 and Olympus E-M1X's LCD screens have the same diagonal size of 3.00 inches.
Both cameras feature
Fully Articulating screens where you can change the angle of the screen to make it easier to shoot from waist or over-the-head levels. Fully articulating screens are also useful for taking Selfies and video.