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 S9100 and Pentax RZ18 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 RZ18 has external dimensions of 97 x 61 x 33 mm (3.82 x 2.4 x 1.3″) and weighs 178 g (0.39 lb / 6.28 oz) (including batteries).
Below you can see the front view size comparison of Nikon S9100 and Pentax RZ18. Pentax RZ18 is clearly the smaller of the two cameras. Its body is 8mm narrower, 1mm shorter and 2mm thinner than Nikon S9100.
Here is the back view size comparison of Nikon S9100 and Pentax RZ18.
Now lets look at the top view comparison of Nikon S9100 and Pentax RZ18.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Pentax RZ18 is significantly lighter (36g ) than the Nikon S9100 which may become a big advantage especially on long walking trips.
Thanks to the weather sealed body of RZ18, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to S9100.
LCD Screen Size and Features
Nikon S9100 and Pentax RZ18's LCD screens has the same diagonal size of 3".
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.