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 SX150 IS and Panasonic ZS50 side-by-side from the front, back and top in their relative dimensions. Canon SX150 IS has external dimensions of 113 x 73 x 46 mm (4.45 x 2.87 x 1.81″) and weighs 306 g (0.67 lb / 10.79 oz) (including batteries). Panasonic ZS50 has external dimensions of 111 x 65 x 34 mm (4.37 x 2.56 x 1.34″) and weighs 243 g (0.54 lb / 8.57 oz) (including batteries).
Below you can see the front view size comparison of Canon SX150 IS and Panasonic ZS50. Panasonic ZS50 is clearly the smaller of the two cameras. Its body is 2mm narrower, 8mm shorter and 12mm thinner than Canon SX150 IS.
Now lets look at the top view comparison of Canon SX150 IS and Panasonic ZS50.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Panasonic ZS50 is significantly lighter (63g ) than the Canon SX150 IS which may become a big advantage especially on long walking trips.
Unfortunately neither Canon PowerShot SX150 IS nor Panasonic Lumix DMC-ZS50 (Lumix DMC-TZ70) provides any type of weather sealing in their body, 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 SX150 IS and Panasonic ZS50's LCD screens has the same diagonal size of 3".
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.