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 S1 and Olympus TG-5 side-by-side from the front, back and top in their relative dimensions. Pentax S1 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). Olympus TG-5 has external dimensions of 113 x 66 x 32 mm (4.45 x 2.6 x 1.26″) and weighs 250 g (0.55 lb / 8.82 oz) (including batteries).
Below you can see the front-view size comparison of the Pentax S1 and the Olympus TG-5. Pentax S1 is 8mm shorter and 4mm thinner than Olympus TG-5 but it is also 1mm wider.
Here is the back view size comparison of the Pentax S1 and Olympus TG-5.
Now lets look at the top view comparison of Pentax S1 and Olympus TG-5.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Pentax S1 is significantly lighter (93g ) than the Olympus TG-5 which may become a big advantage especially on long walking trips.
Weather Sealing
Thanks to the weather-sealed body of the TG-5, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to the S1.
LCD Screen Size and Features
Olympus TG-5's 3.00" LCD screen is slightly larger than Pentax S1's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.