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 FS15 and Panasonic 3D1 side-by-side from the front, back and top in their relative dimensions. Panasonic FS15 has external dimensions of 97 x 54 x 22 mm (3.82 x 2.13 x 0.87″) and weighs 136 g (0.30 lb / 4.80 oz) (including batteries). Panasonic 3D1 has external dimensions of 108 x 58 x 24 mm (4.25 x 2.28 x 0.94″) and weighs 193 g (0.43 lb / 6.81 oz) (including batteries).
Below you can see the front-view size comparison of the Panasonic FS15 and the Panasonic 3D1. Panasonic FS15 is clearly the smaller of the two cameras. Its body is 11mm narrower, 4mm shorter and 2mm thinner than Panasonic 3D1.
Comparison image of the Panasonic FS15 and the Panasonic 3D1 Size, Weight and External Dimensions - Front View
Here is the back view size comparison of the Panasonic FS15 and Panasonic 3D1.
Comparison image of the Panasonic FS15 and the Panasonic 3D1 Size and Weight - Back View
Now lets look at the top view comparison of Panasonic FS15 and Panasonic 3D1.
Top View Comparison image of the Panasonic FS15 and the Panasonic 3D1 Size
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Panasonic FS15 is significantly lighter (57g ) than the Panasonic 3D1 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Panasonic Lumix DMC-FS15 nor Panasonic Lumix DMC-3D1 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 3D1's 3.50" LCD screen is slightly larger than Panasonic FS15's 2.7" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.