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 Panasonic ZS8 and Canon SX40 HS side-by-side from the front, back and top in their relative dimensions. Panasonic ZS8 has external dimensions of 105 x 58 x 33 mm (4.13 x 2.28 x 1.3″) and weighs 210 g (0.46 lb / 7.41 oz) (including batteries). Canon SX40 HS has external dimensions of 123 x 92 x 108 mm (4.84 x 3.62 x 4.25″) and weighs 600 g (1.32 lb / 21.16 oz) (including batteries).
Below you can see the front-view size comparison of the Panasonic ZS8 and the Canon SX40 HS. Panasonic ZS8 is clearly the smaller of the two cameras. Its body is 18mm narrower, 34mm shorter and 75mm thinner than Canon SX40 HS.
Here is the back view size comparison of the Panasonic ZS8 and Canon SX40 HS.
Now lets look at the top view comparison of Panasonic ZS8 and Canon SX40 HS.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Panasonic ZS8 is significantly lighter (390g ) than the Canon SX40 HS which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Panasonic Lumix DMC-ZS8 (Lumix DMC-TZ18) nor Canon PowerShot SX40 HS provides any type of weather sealing in their bodies, so you have to give extra care especially when you are shooting outdoors. If weather sealing is a must-have feature for you, check these sections: Top Compact Cameras with Weather Sealing Top Bridge Cameras with Weather Sealing
LCD Screen Size and Features
Panasonic ZS8's 3.00" LCD screen is slightly larger than Canon SX40 HS's 2.7 screen.