Size and weight is a big decision factor when you are trying to find the ideal camera for your needs.
In this section, We are going to illustrate Canon SX20 IS and Pentax W90 side-by-side from the front, back and top in their relative dimensions. Canon SX20 IS has external dimensions of 128 x 88 x 87 mm (5.04 x 3.46 x 3.43″) and weighs 600 g (1.32 lb / 21.16 oz) (including batteries). Pentax W90 has external dimensions of 108 x 59 x 25 mm (4.25 x 2.32 x 0.98″) and weighs 164 g (0.36 lb / 5.78 oz) (including batteries).
Below you can see the front view size comparison of Canon SX20 IS and Pentax W90. Pentax W90 is clearly the smaller of the two cameras. Its body is 20mm narrower, 29mm shorter and 62mm thinner than Canon SX20 IS.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Pentax W90 is significantly lighter (436g ) than the Canon SX20 IS which may become a big advantage especially on long walking trips.
LCD Screen Size and Features
Pentax W90's 2.7" LCD screen is slightly larger than Canon SX20 IS's 2.5" screen.
On the other hand, Canon SX20 IS sports a Fully Articulated screen
which you can change the angle and position of the screen almost freely, making it possible to shoot from waist or over the head levels, and especially very useful for shooting selfies and video. On the other hand, Pentax W90 has a fixed type screen which provides almost no flexibility in shooting positions compared to SX20 IS.