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 FX48 and Panasonic ZR3 side-by-side from the front, back and top in their relative dimensions. Panasonic FX48 has external dimensions of 95 x 53 x 22 mm (3.74 x 2.09 x 0.87″) and weighs 150 g (0.33 lb / 5.29 oz) (including batteries). Panasonic ZR3 has external dimensions of 98 x 55 x 26 mm (3.86 x 2.17 x 1.02″) and weighs 159 g (0.35 lb / 5.61 oz) (including batteries).
Below you can see the front view size comparison of Panasonic FX48 and Panasonic ZR3. Panasonic FX48 is clearly the smaller of the two cameras. Its body is 3mm narrower, 2mm shorter and 4mm thinner than Panasonic ZR3.
Here is the back view size comparison of Panasonic FX48 and Panasonic ZR3.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Panasonic FX48 is 9g lighter than the Panasonic ZR3 but we don't think this will make a significant difference.
Unfortunately neither Panasonic Lumix DMC-FX48 (Lumix DMC-FX40) nor Panasonic Lumix DMC-ZR3 (Lumix DMC-ZX3) 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 ZR3's 2.7" LCD screen is slightly larger than Panasonic FX48's 2.5" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.