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 D100 and Nikon D200 side-by-side from the front, back and top in their relative dimensions. Nikon D100 has external dimensions of 144 x 116 x 81 mm (5.67 x 4.57 x 3.19″) and weighs 780 g (1.72 lb / 27.51 oz) (including batteries). Nikon D200 has external dimensions of 147 x 113 x 74 mm (5.79 x 4.45 x 2.91″) and weighs 920 g (2.03 lb / 32.45 oz) (including batteries).
Below you can see the front view size comparison of Nikon D100 and Nikon D200. Nikon D200 is 3mm shorter and 7mm thinner than Nikon D100 but it is also 3mm wider.
Now lets look at the top view comparison of Nikon D100 and Nikon D200.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Nikon D100 is significantly lighter (140g ) than the Nikon D200 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 have to also take into account the lenses that you will be using with these bodies. Since both Nikon D100 and Nikon D200 have the same Nikon F lens mount and APS-C sized sensors, lenses will not be a differentiator on total size of the system.
Thanks to the weather sealed body of D200, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to D100.
LCD Screen Size and Features
Nikon D200's 2.5" LCD screen is slightly larger than Nikon D100's 1.8" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.