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 Panasonic ZS1 and Pentax W90 side-by-side from the front, back and top in their relative dimensions. Panasonic ZS1 has external dimensions of 103 x 60 x 33 mm (4.06 x 2.36 x 1.3″) and weighs 229 g (0.50 lb / 8.08 oz) (including batteries). 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).
Below you can see the front view size comparison of Panasonic ZS1 and Pentax W90. Pentax W90 is 1mm shorter and 8mm thinner than Panasonic ZS1 but it is also 5mm wider.
Here is the back view size comparison of Panasonic ZS1 and Pentax W90.
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 (65g ) than the Panasonic ZS1 which may become a big advantage especially on long walking trips.
LCD Screen Size and Features
Panasonic ZS1 and Pentax W90'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.