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 Pentax RZ18 and Nikon P310 side-by-side from the front, back and top in their relative dimensions. Pentax RZ18 has external dimensions of 97 x 61 x 33 mm (3.82 x 2.4 x 1.3″) and weighs 178 g (0.39 lb / 6.28 oz) (including batteries). Nikon P310 has external dimensions of 103 x 58 x 32 mm (4.06 x 2.28 x 1.26″) and weighs 194 g (0.43 lb / 6.84 oz) (including batteries).
Below you can see the front view size comparison of Pentax RZ18 and Nikon P310. Nikon P310 is 3mm shorter and 1mm thinner than Pentax RZ18 but it is also 6mm wider.
Here is the back view size comparison of Pentax RZ18 and Nikon P310.
Now lets look at the top view comparison of Pentax RZ18 and Nikon P310.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Pentax RZ18 is 16g lighter than the Nikon P310 but we don't think this will make a significant difference.
With its weather sealed body, we believe that RZ18 has a big advantage over P310 which doesn't provide any kind of environmental sealing.
LCD Screen Size and Features
Pentax RZ18 and Nikon P310'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.