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 A100 and Nikon S2900 side-by-side from the front, back and top in their relative dimensions. Nikon A100 has external dimensions of 95 x 59 x 20 mm (3.74 x 2.32 x 0.79″) and weighs 119 g (0.26 lb / 4.20 oz) (including batteries). Nikon S2900 has external dimensions of 95 x 59 x 20 mm (3.74 x 2.32 x 0.79″) and weighs 119 g (0.26 lb / 4.20 oz) (including batteries).
Below you can see the front view size comparison of Nikon A100 and Nikon S2900. In this case, we can see that Nikon A100 and Nikon S2900 have the exact same height, width and thickness.
Here is the back view size comparison of Nikon A100 and Nikon S2900.
Now lets look at the top view comparison of Nikon A100 and Nikon S2900.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Nikon A100 and Nikon S2900 have exactly the same weight of 119g.
Unfortunately neither Nikon Coolpix A100 nor Nikon Coolpix S2900 provides any type of weather sealing in their body, so you have to give extra care especially when you are shooting outdoors. If weather sealing is a must-have feature for you, check these sections: Top Compact Cameras with Weather Sealing
LCD Screen Size and Features
Nikon A100 and Nikon S2900's LCD screens has the same diagonal size of 2.7".
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.