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 Olympus SP-820UZ and Nikon P7100 side-by-side from the front, back and top in their relative dimensions. Olympus SP-820UZ has external dimensions of and weighs 485 g (1.07 lb / 17.11 oz) (including batteries). Nikon P7100 has external dimensions of 116 x 77 x 48 mm (4.57 x 3.03 x 1.89″) and weighs 395 g (0.87 lb / 13.93 oz) (including batteries).
Below you can see the front-view size comparison of the Olympus SP-820UZ and the Nikon P7100. Nikon P7100 is clearly the smaller of the two cameras. Its body is 1mm narrower, 1mm shorter and 45mm thinner than Olympus SP-820UZ.
Now lets look at the top view comparison of Olympus SP-820UZ and Nikon P7100.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Nikon P7100 is significantly lighter (90g ) than the Olympus SP-820UZ which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Olympus Stylus SP-820UZ nor Nikon Coolpix P7100 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
Olympus SP-820UZ and Nikon P7100's LCD screens have the same diagonal size of 3.00 inches.
On the other hand, Nikon P7100 features a
Tilting screen where you can change the angle of the screen to make it easier to shoot from waist or over-the-head levels whereas the Olympus SP-820UZ has a fixed type screen which provides less flexibility in shooting positions compared to P7100.