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 G9 and Nikon D5100 side-by-side from the front, back and top in their relative dimensions. Panasonic G9 has external dimensions of 137 x 97 x 92 mm (5.39 x 3.82 x 3.62″) and weighs 658 g (1.45 lb / 23.21 oz) (including batteries). Nikon D5100 has external dimensions of 128 x 97 x 79 mm (5.04 x 3.82 x 3.11″) and weighs 560 g (1.23 lb / 19.75 oz) (including batteries).
Below you can see the front-view size comparison of the Panasonic G9 and the Nikon D5100. Panasonic G9 has the same height with Nikon D5100. On the other hand, with a width of 137mm, it is 9 wider and also with a thickness of 92mm, it is 13mm thicker than Nikon D5100.
Here is the back view size comparison of the Panasonic G9 and Nikon D5100.
Now lets look at the top view comparison of Panasonic G9 and Nikon D5100.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Nikon D5100 is significantly lighter (98g ) than the Panasonic G9 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 Nikon D5100 has an APS-C sized sensor and Panasonic G9 has a smaller Four Thirds sensor, Panasonic G9's lenses for a similar focal length and aperture will generally be lighter and smaller than the Nikon D5100 lenses.
With its weather-sealed body, we believe that the G9 has a big advantage over the D5100 which doesn't provide any kind of environmental sealing.
LCD Screen Size and Features
Panasonic G9 and Nikon D5100'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.