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 D810A and Pentax K-1 II side-by-side from the front, back and top in their relative dimensions. Nikon D810A has external dimensions of 146 x 123 x 82 mm (5.75 x 4.84 x 3.23″) and weighs 880 g (1.94 lb / 31.04 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 the Nikon D810A and the Pentax K-1 II. Pentax K-1 II is 9mm narrower and 13mm shorter than Nikon D810A but it is also 4mm thicker.
Here is the back view size comparison of the Nikon D810A and Pentax K-1 II.
Now lets look at the top view comparison of Nikon D810A 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 D810A is 130g 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 also have to take into account the lenses that you will be using with these bodies. Since both Nikon D810A 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 the D810A and the K-1 Mark II have weather sealings in their bodies, making them resistant to water and dust.
LCD Screen Size and Features
Nikon D810A and Pentax K-1 II's LCD screens have the same diagonal size of 3.20 inches.
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 D810A's LCD screen is a fixed type which provides almost no flexibility in shooting positions compared to K-1 Mark II.