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 Nikon P500 and Panasonic GH3 side-by-side from the front, back and top in their relative dimensions. Nikon P500 has external dimensions of 116 x 84 x 10 mm (4.57 x 3.31 x 4.06″) and weighs 494 g (1.09 lb / 17.43 oz) (including batteries). 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).
Below you can see the front view size comparison of Nikon P500 and Panasonic GH3. Nikon P500 is 17mm narrower and 9mm shorter than Panasonic GH3 but it is also 21mm thicker. As you can tell, actually this is not a fair size comparison since Nikon P500 has a built-in lens but Panasonic GH3 doesn't. Once you put a lens on GH3, its thickness will increase significantly.
Here is the back view size comparison of Nikon P500 and Panasonic GH3.
Now lets look at the top view comparison of Nikon P500 and Panasonic GH3.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Nikon P500 is 56g lighter than the Panasonic GH3 but we don't think this will make a significant difference.
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 GH3, the total kit will weigh much higher.
Thanks to the weather sealed body of GH3, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to P500.
LCD Screen Size and Features
Nikon P500 and Panasonic GH3's LCD screens has the same diagonal size of 3".
Nikon P500 features a Tilting only screen
which is mostly only good for shooting from waist or over the head levels. On the other hand, Panasonic GH3 sports a Fully Articulated screen
which is more flexible and useful especially for taking Selfie shots and video.