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 WG-1 and Panasonic ZS40 side-by-side from the front, back and top in their relative dimensions. Pentax WG-1 has external dimensions of 114 x 58 x 28 mm (4.49 x 2.28 x 1.1″) and weighs 157 g (0.35 lb / 5.54 oz) (including batteries). Panasonic ZS40 has external dimensions of 111 x 64 x 34 mm (4.37 x 2.52 x 1.34″) and weighs 240 g (0.53 lb / 8.47 oz) (including batteries).
Below you can see the front-view size comparison of the Pentax WG-1 and the Panasonic ZS40. Pentax WG-1 is 6mm shorter and 6mm thinner than Panasonic ZS40 but it is also 3mm wider.
Here is the back view size comparison of the Pentax WG-1 and Panasonic ZS40.
Now lets look at the top view comparison of Pentax WG-1 and Panasonic ZS40.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Pentax WG-1 is significantly lighter (83g ) than the Panasonic ZS40 which may become a big advantage especially on long walking trips.
Weather Sealing
Thanks to the weather-sealed body of the WG-1, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to the ZS40.
LCD Screen Size and Features
Panasonic ZS40's 3.00" LCD screen is slightly larger than Pentax WG-1's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.