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-3 and Canon A2100 IS side-by-side from the front, back and top in their relative dimensions. Pentax WG-3 has external dimensions of 124 x 64 x 33 mm (4.9 x 2.5 x 1.3″) and weighs 230 g (0.51 lb / 8.11 oz) (including batteries). Canon A2100 IS has external dimensions of 102 x 64 x 32 mm (4.02 x 2.52 x 1.26″) and weighs 185 g (0.41 lb / 6.53 oz) (including batteries).
Below you can see the front-view size comparison of the Pentax WG-3 and the Canon A2100 IS. Pentax WG-3 has the same height with Canon A2100 IS. On the other hand, with a width of 124mm, it is 22 wider and also with a thickness of 33mm, it is 1mm thicker than Canon A2100 IS.
Here is the back view size comparison of the Pentax WG-3 and Canon A2100 IS.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon A2100 IS is significantly lighter (45g ) than the Pentax WG-3 which may become a big advantage especially on long walking trips.
Weather Sealing
Thanks to the weather-sealed body of the WG-3, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to the A2100 IS.
LCD Screen Size and Features
Pentax WG-3 and Canon A2100 IS's LCD screens have the same diagonal size of 3.00 inches.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.