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 Nikon P7800 and Pentax W90 side-by-side from the front, back and top in their relative dimensions. 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). Pentax W90 has external dimensions of 108 x 59 x 25 mm (4.25 x 2.32 x 0.98″) and weighs 164 g (0.36 lb / 5.78 oz) (including batteries).
Below you can see the front-view size comparison of the Nikon P7800 and the Pentax W90. Pentax W90 is clearly the smaller of the two cameras. Its body is 11mm narrower, 19mm shorter and 25mm thinner than Nikon P7800.
Here is the back view size comparison of the Nikon P7800 and Pentax W90.
Now lets look at the top view comparison of Nikon P7800 and Pentax W90.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Pentax W90 is significantly lighter (235g ) than the Nikon P7800 which may become a big advantage especially on long walking trips.
Weather Sealing
Thanks to the weather-sealed body of the W90, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to the P7800.
LCD Screen Size and Features
Nikon P7800's 3.00" LCD screen is slightly larger than Pentax W90's 2.7" screen.
Moreover, 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. On the other hand, Pentax W90 has a fixed type screen which provides almost no flexibility in shooting positions compared to P7800.