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 Sony HX400V and Panasonic GH4 side-by-side from the front, back and top in their relative dimensions. Sony HX400V has external dimensions of 130 x 93 x 103 mm (5.1 x 3.67 x 4.06″) and weighs 660 g (1.46 lb / 23.28 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 the Sony HX400V and the Panasonic GH4. As you can tell, actually this is not a fair size comparison since Sony HX400V has a built-in lens but Panasonic GH4 doesn't. Once you put a lens on GH4, its thickness will increase significantly.
Here is the back view size comparison of the Sony HX400V and Panasonic GH4.
Now lets look at the top view comparison of Sony HX400V and Panasonic GH4.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Panasonic GH4 is significantly lighter (100g ) than the Sony HX400V which may become a big advantage especially on long walking trips.
Again, this comparison may not be very useful in real life as we are comparing the weight of a camera with a built-in lens to the body-only weight of an interchangeable lens camera. Once you put a lens on GH4, the total kit will weigh much higher.
Weather Sealing
Thanks to the weather-sealed body of the GH4, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to the HX400V.
LCD Screen Size and Features
Sony HX400V and Panasonic GH4's LCD screens have the same diagonal size of 3.00 inches.
Sony HX400V features a
Tilting-only screen which is mostly only good for shooting from waist or over-the-head levels. On the other hand, Panasonic GH4 sports a
Fully Articulated screen which is more flexible and useful, especially for taking selfies and video.