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 Sony W830 and Nikon A100 side-by-side from the front, back and top in their relative dimensions. Sony W830 has external dimensions of 93 x 52 x 23 mm (3.66 x 2.05 x 0.91″) and weighs 122 g (0.27 lb / 4.30 oz) (including batteries). 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).
Below you can see the front-view size comparison of the Sony W830 and the Nikon A100. Sony W830 is 2mm narrower and 7mm shorter than Nikon A100 but it is also 3mm thicker.
Here is the back view size comparison of the Sony W830 and Nikon A100.
Now lets look at the top view comparison of Sony W830 and Nikon A100.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Nikon A100 is 3g lighter than the Sony W830 but we don't think this will make a significant difference.
Weather Sealing
Unfortunately neither the Sony Cyber-shot DSC-W830 nor Nikon Coolpix A100 provides any type of weather sealing in their bodies, 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
Sony W830 and Nikon A100's LCD screens have the same diagonal size of 2.70 inches.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.