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 Nikon D800 and Pentax K-1 II side-by-side from the front, back and top in their relative dimensions. Nikon D800 has external dimensions of 146 x 123 x 82 mm (5.75 x 4.84 x 3.23″) and weighs 900 g (1.98 lb / 31.75 oz) (including batteries). Pentax K-1 II has external dimensions of 137 x 110 x 86 mm (5.39 x 4.33 x 3.39″) and weighs 1010 g (2.23 lb / 35.63 oz) (including batteries).
Below you can see the front view size comparison of Nikon D800 and Pentax K-1 II. Pentax K-1 II is 9mm narrower and 13mm shorter than Nikon D800 but it is also 4mm thicker.
Here is the back view size comparison of Nikon D800 and Pentax K-1 II.
Now lets look at the top view comparison of Nikon D800 and Pentax K-1 II.
Weight is another important factor especially when deciding on a camera that you want to carry with you all day.
Nikon D800 is 110g lighter than the Pentax K-1 II but we don't think this will make a significant difference.
Also keep in mind that body weight is not the only deciding factor when comparing two interchangeable camera bodies, you have to also take into account the lenses that you will be using with these bodies. Since both Nikon D800 and Pentax K-1 II have the same Full frame sized sensor, their lenses for a similar focal length and aperture will be similar in size and weight.
Both D800 and K-1 Mark II have weather sealings in their body, making them resistant to water and dust.
LCD Screen Size and Features
Nikon D800 and Pentax K-1 II's LCD screens has the same diagonal size of 3.20".
On the other hand, Pentax K-1 II 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. Nikon D800's LCD screen is a fixed type which provides almost no flexibility in shooting positions compared to K-1 Mark II.