Size and weight is a big decision factor when you are trying to find the ideal camera for your needs.
In this section, We are going to illustrate Panasonic GH3 and Panasonic GH4 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). Panasonic GH4 has external dimensions of 133 x 93 x 84 mm (5.24 x 3.66 x 3.31″) and weighs 560 g (1.23 lb / 19.75 oz) (including batteries).
Below you can see the front view size comparison of Panasonic GH3 and Panasonic GH4. Panasonic GH3 has the same height and width with Panasonic GH4. On the other hand, with a thickness of 82mm, it is 2mm thinner.
Here is the back view size comparison of Panasonic GH3 and Panasonic GH4.
Now lets look at the top view comparison of Panasonic GH3 and Panasonic GH4.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Panasonic GH3 is 10g lighter than the Panasonic GH4 but we don't think this will make a significant difference.
Also keep in mind that body weight is not the only deciding factor when comparing two interchangeable camera bodies, you have to also take into account the lenses that you will be using with these bodies. Since both Panasonic GH3 and Panasonic GH4 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.
Both GH3 and GH4 have weather sealings in their body, making them resistant to water and dust.
LCD Screen Size and Features
Panasonic GH3 and Panasonic GH4's LCD screens has the same diagonal size of 3".
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 Selfie shots and video.