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 ZS100 and Olympus SP-620 UZ side-by-side from the front, back and top in their relative dimensions. Panasonic ZS100 has external dimensions of 111 x 65 x 44 mm (4.37 x 2.56 x 1.73″) and weighs 312 g (0.69 lb / 11.01 oz) (including batteries). Olympus SP-620 UZ has external dimensions of 110 x 74 x 74 mm (4.33 x 2.91 x 2.91″) and weighs 435 g (including batteries).
Below you can see the front-view size comparison of the Panasonic ZS100 and the Olympus SP-620 UZ. Panasonic ZS100 is 9mm shorter and 30mm thinner than Olympus SP-620 UZ but it is also 1mm wider.
Here is the back view size comparison of the Panasonic ZS100 and Olympus SP-620 UZ.
Now lets look at the top view comparison of Panasonic ZS100 and Olympus SP-620 UZ.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Panasonic ZS100 is significantly lighter (123g ) than the Olympus SP-620 UZ which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Panasonic Lumix DMC-ZS100 (Lumix DMC-TZ100) nor Olympus SP-620 UZ 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
Panasonic ZS100 and Olympus SP-620 UZ'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.