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 Nikon D610 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). Nikon D610 has external dimensions of 141 x 113 x 82 mm (5.55 x 4.45 x 3.23″) and weighs 850 g (1.87 lb / 29.98 oz) (including batteries).
Below you can see the front-view size comparison of the Panasonic G100 and the Nikon D610. Panasonic G100 is clearly the smaller of the two cameras. Its body is 25mm narrower, 30mm shorter and 28mm thinner than Nikon D610.
Now lets look at the top view comparison of Panasonic G100 and Nikon D610.
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 (498g ) than the Nikon D610 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 D610 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 Nikon D610 lenses.
Weather Sealing
Thanks to the weather-sealed body of the D610, 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
Nikon D610's 3.20" LCD screen is slightly larger than Panasonic G100's 3 screen.
On the other hand, Panasonic G100 sports a
Fully Articulated screen which you can change the angle and position of the screen almost freely, making it possible to shoot from waist or over-the-head levels, and especially very useful for shooting selfies and video. On the other hand, Nikon D610 has a fixed type screen which provides almost no flexibility in shooting positions compared to G100.