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 Fujifilm T550 and Panasonic ZS40 side-by-side from the front, back and top in their relative dimensions. Fujifilm T550 has external dimensions of and weighs 136 g (including batteries). Panasonic ZS40 has external dimensions of 111 x 64 x 34 mm (4.37 x 2.52 x 1.34″) and weighs 240 g (0.53 lb / 8.47 oz) (including batteries).
Below you can see the front-view size comparison of the Fujifilm T550 and the Panasonic ZS40. Fujifilm T550 is clearly the smaller of the two cameras. Its body is 12mm narrower, 7mm shorter and 8mm thinner than Panasonic ZS40.
Here is the back view size comparison of the Fujifilm T550 and Panasonic ZS40.
Now lets look at the top view comparison of Fujifilm T550 and Panasonic ZS40.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Fujifilm T550 is significantly lighter (104g ) than the Panasonic ZS40 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Fujifilm FinePix T550 nor Panasonic Lumix DMC-ZS40 (Lumix DMC-TZ60) 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
Fujifilm T550 and Panasonic ZS40'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.