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 Pentax W90 and Panasonic ZS8 side-by-side from the front, back and top in their relative dimensions. Pentax W90 has external dimensions of 108 x 59 x 25 mm (4.25 x 2.32 x 0.98″) and weighs 164 g (0.36 lb / 5.78 oz) (including batteries). Panasonic ZS8 has external dimensions of 105 x 58 x 33 mm (4.13 x 2.28 x 1.3″) and weighs 210 g (0.46 lb / 7.41 oz) (including batteries).
Below you can see the front-view size comparison of the Pentax W90 and the Panasonic ZS8. Panasonic ZS8 is 3mm narrower and 1mm shorter than Pentax W90 but it is also 8mm thicker.
Here is the back view size comparison of the Pentax W90 and Panasonic ZS8.
Now lets look at the top view comparison of Pentax W90 and Panasonic ZS8.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Pentax W90 is significantly lighter (46g ) than the Panasonic ZS8 which may become a big advantage especially on long walking trips.
Weather Sealing
Thanks to the weather-sealed body of the W90, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to the ZS8.
LCD Screen Size and Features
Panasonic ZS8's 3.00" LCD screen is slightly larger than Pentax W90's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.