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 FX78 and Fujifilm F800EXR side-by-side from the front, back and top in their relative dimensions. Panasonic FX78 has external dimensions of 100 x 55 x 21 mm (3.94 x 2.17 x 0.83″) and weighs 142 g (0.31 lb / 5.01 oz) (including batteries). Fujifilm F800EXR has external dimensions of 105 x 63 x 36 mm (4.13 x 2.48 x 1.42″) and weighs 232 g (0.51 lb / 8.18 oz) (including batteries).
Below you can see the front-view size comparison of the Panasonic FX78 and the Fujifilm F800EXR. Panasonic FX78 is clearly the smaller of the two cameras. Its body is 5mm narrower, 8mm shorter and 15mm thinner than Fujifilm F800EXR.
Here is the back view size comparison of the Panasonic FX78 and Fujifilm F800EXR.
Now lets look at the top view comparison of Panasonic FX78 and Fujifilm F800EXR.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Panasonic FX78 is significantly lighter (90g ) than the Fujifilm F800EXR which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Panasonic Lumix DMC-FX78 (Lumix DMC-FX77) nor Fujifilm FinePix F800EXR 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 FX78's 3.50" LCD screen is slightly larger than Fujifilm F800EXR's 3" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.