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 Pentax VS20 and Nikon P7800 side-by-side from the front, back and top in their relative dimensions. Pentax VS20 has external dimensions of 111 x 61 x 38 mm (4.37 x 2.4 x 1.5″) and weighs 235 g (0.52 lb / 8.29 oz) (including batteries). Nikon P7800 has external dimensions of 119 x 78 x 50 mm (4.69 x 3.07 x 1.97″) and weighs 399 g (0.88 lb / 14.07 oz) (including batteries).
Below you can see the front-view size comparison of the Pentax VS20 and the Nikon P7800. Pentax VS20 is clearly the smaller of the two cameras. Its body is 8mm narrower, 17mm shorter and 12mm thinner than Nikon P7800.
Here is the back view size comparison of the Pentax VS20 and Nikon P7800.
Now lets look at the top view comparison of Pentax VS20 and Nikon P7800.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Pentax VS20 is significantly lighter (164g ) than the Nikon P7800 which may become a big advantage especially on long walking trips.
Weather Sealing
Unfortunately neither the Pentax Optio VS20 nor Nikon Coolpix P7800 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
Pentax VS20 and Nikon P7800's LCD screens have the same diagonal size of 3.00 inches.
On the other hand, Nikon P7800 sports a
Fully Articulated screen which you can change the angle and position of the screen almost freely, making it possible to shoot from waist or over-the-head levels, and especially very useful for shooting selfies and video. Pentax VS20's LCD screen is a fixed type which provides almost no flexibility in shooting positions compared to P7800.