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 ZS40 and Nikon S810c side-by-side from the front, back and top in their relative dimensions. Panasonic ZS40 has external dimensions of 111 x 64 x 34 mm (4.37 x 2.52 x 1.34″) and weighs 240 g (0.53 lb / 8.47 oz) (including batteries). Nikon S810c has external dimensions of 113 x 64 x 28 mm (4.45 x 2.52 x 1.1″) and weighs 216 g (0.48 lb / 7.62 oz) (including batteries).
Below you can see the front-view size comparison of the Panasonic ZS40 and the Nikon S810c.
Here is the back view size comparison of the Panasonic ZS40 and Nikon S810c.
Now lets look at the top view comparison of Panasonic ZS40 and Nikon S810c.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Nikon S810c is 24g lighter than the Panasonic ZS40 but we don't think this will make a significant difference.
Weather Sealing
Unfortunately neither the Panasonic Lumix DMC-ZS40 (Lumix DMC-TZ60) nor Nikon Coolpix S810c 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
Nikon S810c's 3.70" LCD screen is slightly larger than Panasonic ZS40's 3" screen.
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.