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 P70 and Olympus TG-3 side-by-side from the front, back and top in their relative dimensions. Pentax P70 has external dimensions of 97 x 54 x 22 mm (3.82 x 2.13 x 0.87″) and weighs 155 g (0.34 lb / 5.47 oz) (including batteries). Olympus TG-3 has external dimensions of 112 x 66 x 31 mm (4.41 x 2.6 x 1.22″) and weighs 247 g (0.54 lb / 8.71 oz) (including batteries).
Below you can see the front-view size comparison of the Pentax P70 and the Olympus TG-3. Pentax P70 is clearly the smaller of the two cameras. Its body is 15mm narrower, 12mm shorter and 9mm thinner than Olympus TG-3.
Here is the back view size comparison of the Pentax P70 and Olympus TG-3.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Pentax P70 is significantly lighter (92g ) than the Olympus TG-3 which may become a big advantage especially on long walking trips.
Weather Sealing
Thanks to the weather-sealed body of the TG-3, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to the P70.
LCD Screen Size and Features
Olympus TG-3's 3.00" LCD screen is slightly larger than Pentax P70's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.