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 Panasonic ZS45 and Panasonic ZS50 side-by-side from the front, back and top in their relative dimensions. Panasonic ZS45 has external dimensions of 108 x 60 x 32 mm (4.25 x 2.36 x 1.26″) and weighs 249 g (0.55 lb / 8.78 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 Panasonic ZS45 and Panasonic ZS50. Panasonic ZS45 is clearly the smaller of the two cameras. Its body is 3mm narrower, 5mm shorter and 2mm thinner than Panasonic ZS50.
Here is the back view size comparison of Panasonic ZS45 and Panasonic ZS50.
Now lets look at the top view comparison of Panasonic ZS45 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 6g lighter than the Panasonic ZS45 but we don't think this will make a significant difference.
Unfortunately neither Panasonic Lumix DMC-ZS45 (Lumix DMC-TZ57) 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
Panasonic ZS45 and Panasonic ZS50's LCD screens has the same diagonal size of 3".
On the other hand, Panasonic ZS45 features a Tilting screen
where you can change the angle of the screen to make it easier to shoot from waist or over the head levels whereas the Panasonic ZS50 has a fixed type screen which provides less flexibility in shooting positions compared to ZS45.