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 G100 and Sony A7 III side-by-side from the front, back and top in their relative dimensions. Panasonic G100 has external dimensions of 116 x 83 x 54 mm (4.57 x 3.27 x 2.13″) and weighs 352 g (0.78 lb / 12.42 oz) (including batteries). Sony A7 III has external dimensions of 127 x 96 x 74 mm (5 x 3.78 x 2.91″) and weighs 650 g (1.43 lb / 22.93 oz) (including batteries).
Below you can see the front-view size comparison of the Panasonic G100 and the Sony A7 III. Panasonic G100 is clearly the smaller of the two cameras. Its body is 11mm narrower, 13mm shorter and 20mm thinner than Sony A7 III.
Here is the back view size comparison of the Panasonic G100 and Sony A7 III.
Now lets look at the top view comparison of Panasonic G100 and Sony A7 III.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Panasonic G100 is significantly lighter (298g ) than the Sony A7 III 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 Sony A7 III has a Full frame sensor and Panasonic G100 has a smaller Four Thirds sensor, Panasonic G100's lenses for a similar focal length and aperture will generally be lighter and smaller than the Sony A7 III lenses.
Weather Sealing
Thanks to the weather-sealed body of the A7 III, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to the G100.
LCD Screen Size and Features
Panasonic G100 and Sony A7 III's LCD screens have the same diagonal size of 3.00 inches.
Sony A7 III features a
Tilting-only screen which is mostly only good for shooting from waist or over-the-head levels. On the other hand, Panasonic G100 sports a
Fully Articulated screen which is more flexible and useful, especially for taking selfies and video.