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 Nikon S9100 and Pentax WG-2 side-by-side from the front, back and top in their relative dimensions. Nikon S9100 has external dimensions of 105 x 62 x 35 mm (4.13 x 2.44 x 1.38″) and weighs 214 g (0.47 lb / 7.55 oz) (including batteries). Pentax WG-2 has external dimensions of 122 x 61 x 30 mm (4.8 x 2.4 x 1.18″) and weighs 192 g (0.42 lb / 6.77 oz) (including batteries).
Below you can see the front-view size comparison of the Nikon S9100 and the Pentax WG-2. Pentax WG-2 is 1mm shorter and 5mm thinner than Nikon S9100 but it is also 17mm wider.
Here is the back view size comparison of the Nikon S9100 and Pentax WG-2.
Now lets look at the top view comparison of Nikon S9100 and Pentax WG-2.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Pentax WG-2 is 22g lighter than the Nikon S9100 but we don't think this will make a significant difference.
Weather Sealing
Thanks to the weather-sealed body of the WG-2, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to the S9100.
LCD Screen Size and Features
Nikon S9100 and Pentax WG-2's LCD screens have the same diagonal size of 3.00 inches.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.