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 Olympus SP-800 UZ and Olympus SP-810 UZ side-by-side from the front, back and top in their relative dimensions. Olympus SP-800 UZ has external dimensions of 110 x 90 x 91 mm (4.33 x 3.54 x 3.58″) and weighs 455 g (1.00 lb / 16.05 oz) (including batteries). Olympus SP-810 UZ has external dimensions of 106 x 76 x 74 mm (4.17 x 2.99 x 2.91″) and weighs 413 g (0.91 lb / 14.57 oz) (including batteries).
Below you can see the front view size comparison of Olympus SP-800 UZ and Olympus SP-810 UZ. Olympus SP-810 UZ is clearly the smaller of the two cameras. Its body is 4mm narrower, 14mm shorter and 17mm thinner than Olympus SP-800 UZ.
Here is the back view size comparison of Olympus SP-800 UZ and Olympus SP-810 UZ.
Now lets look at the top view comparison of Olympus SP-800 UZ and Olympus SP-810 UZ.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Olympus SP-810 UZ is 42g lighter than the Olympus SP-800 UZ but we don't think this will make a significant difference.
Unfortunately neither Olympus SP-800 UZ nor Olympus SP-810 UZ 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 Top Bridge Cameras with Weather Sealing
LCD Screen Size and Features
Olympus SP-800 UZ and Olympus SP-810 UZ's LCD screens has the same diagonal size of 3".
Unfortunately, both cameras has fixed screens so they don't tilt or flip in directions.