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 FZ80 and Panasonic LZ40 side-by-side from the front, back and top in their relative dimensions. Panasonic FZ80 has external dimensions of 130 x 94 x 119 mm (5.12 x 3.7 x 4.69″) and weighs 616 g (1.36 lb / 21.73 oz) (including batteries). Panasonic LZ40 has external dimensions of 126 x 87 x 94 mm (4.96 x 3.43 x 3.7″) and weighs 524 g (1.16 lb / 18.48 oz) (including batteries).
Below you can see the front-view size comparison of the Panasonic FZ80 and the Panasonic LZ40. Panasonic LZ40 is clearly the smaller of the two cameras. Its body is 4mm narrower, 7mm shorter and 25mm thinner than Panasonic FZ80.
Now lets look at the top view comparison of Panasonic FZ80 and Panasonic LZ40.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Panasonic LZ40 is significantly lighter (92g ) than the Panasonic FZ80 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Panasonic Lumix DMC-FZ80 (Lumix DMC-FZ82) nor Panasonic Lumix DMC-LZ40 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 Bridge Cameras with Weather Sealing
LCD Screen Size and Features
Panasonic FZ80 and Panasonic LZ40'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.