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 ELPH 510 HS and Panasonic ZS8 side-by-side from the front, back and top in their relative dimensions. Canon ELPH 510 HS has external dimensions of 99 x 59 x 22 mm (3.9 x 2.32 x 0.87″) and weighs 206 g (0.45 lb / 7.27 oz) (including batteries). 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).
Below you can see the front-view size comparison of the Canon ELPH 510 HS and the Panasonic ZS8. Canon ELPH 510 HS is 6mm narrower and 11mm thinner than Panasonic ZS8 but it is also 1mm taller.
Here is the back view size comparison of the Canon ELPH 510 HS and Panasonic ZS8.
Now lets look at the top view comparison of Canon ELPH 510 HS and Panasonic ZS8.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon ELPH 510 HS is 4g lighter than the Panasonic ZS8 but we don't think this will make a significant difference.
Weather Sealing
Unfortunately neither the Canon ELPH 510 HS (IXUS 1100 HS) nor Panasonic Lumix DMC-ZS8 (Lumix DMC-TZ18) 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
LCD Screen Size and Features
Canon ELPH 510 HS's 3.20" LCD screen is slightly larger than Panasonic ZS8's 3" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.