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 SX170 IS and Sony TX20 side-by-side from the front, back and top in their relative dimensions. Canon SX170 IS has external dimensions of 108 x 71 x 44 mm (4.25 x 2.8 x 1.73″) and weighs 251 g (0.55 lb / 8.85 oz) (including batteries). Sony TX20 has external dimensions of 96 x 56 x 18 mm (3.78 x 2.2 x 0.71″) and weighs 133 g (0.29 lb / 4.69 oz) (including batteries).
Below you can see the front-view size comparison of the Canon SX170 IS and the Sony TX20. Sony TX20 is clearly the smaller of the two cameras. Its body is 12mm narrower, 15mm shorter and 26mm thinner than Canon SX170 IS.
Comparison image of the Canon SX170 IS and the Sony TX20 Size, Weight and External Dimensions - Front View
Now lets look at the top view comparison of Canon SX170 IS and Sony TX20.
Top View Comparison image of the Canon SX170 IS and the Sony TX20 Size
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Sony TX20 is significantly lighter (118g ) than the Canon SX170 IS which may become a big advantage especially on long walking trips.
Weather Sealing
Thanks to the weather-sealed body of the TX20, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to the SX170 IS.
LCD Screen Size and Features
Canon SX170 IS and Sony TX20'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.