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 Canon SX620 HS and Pentax WG-3 GPS side-by-side from the front, back and top in their relative dimensions. Canon SX620 HS has external dimensions of 97 x 57 x 28 mm (3.81 x 2.24 x 1.1″) and weighs 182 g (0.40 lb / 6.42 oz) (including batteries). Pentax WG-3 GPS has external dimensions of 125 x 64 x 33 mm (4.9 x 2.5 x 1.3″) and weighs 238 g (0.52 lb / 8.40 oz) (including batteries).
Below you can see the front-view size comparison of the Canon SX620 HS and the Pentax WG-3 GPS. Canon SX620 HS is clearly the smaller of the two cameras. Its body is 28mm narrower, 7mm shorter and 5mm thinner than Pentax WG-3 GPS.
Here is the back view size comparison of the Canon SX620 HS and Pentax WG-3 GPS.
Now lets look at the top view comparison of Canon SX620 HS and Pentax WG-3 GPS.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon SX620 HS is significantly lighter (56g ) than the Pentax WG-3 GPS which may become a big advantage especially on long walking trips.
Weather Sealing
Thanks to the weather-sealed body of the WG-3 GPS, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to the SX620 HS.
LCD Screen Size and Features
Canon SX620 HS and Pentax WG-3 GPS'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.