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 D780 and Nikon D3X side-by-side from the front, back and top in their relative dimensions. Nikon D780 has external dimensions of 144 x 116 x 76 mm (5.67 x 4.57 x 2.99″) and weighs 840 g (1.85 lb / 29.63 oz) (including batteries). Nikon D3X has external dimensions of 160 x 157 x 88 mm (6.3 x 6.18 x 3.46″) and weighs 1260 g (2.78 lb / 44.45 oz) (including batteries).
Below you can see the front-view size comparison of the Nikon D780 and the Nikon D3X. Nikon D780 is clearly the smaller of the two cameras. Its body is 16mm narrower, 41mm shorter and 12mm thinner than Nikon D3X.
Comparison image of the Nikon D780 and the Nikon D3X Size, Weight and External Dimensions - Front View
Here is the back view size comparison of the Nikon D780 and Nikon D3X.
Comparison image of the Nikon D780 and the Nikon D3X Size and Weight - Back View
Now lets look at the top view comparison of Nikon D780 and Nikon D3X.
Top View Comparison image of the Nikon D780 and the Nikon D3X Size
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Nikon D780 is significantly lighter (420g ) than the Nikon D3X which may become a big advantage especially on long walking trips.
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 D780 and Nikon D3X have the same Nikon F lens mount and Full frame sized sensors, lenses will not be a differentiator on total size of the system.
Weather Sealing
Both the D780 and the D3X have weather sealings in their bodies, making them resistant to water and dust.
LCD Screen Size and Features
Nikon D780's 3.20" LCD screen is slightly larger than Nikon D3X's 3 screen.
In addition to the size advantage, Nikon D780 LCD screen also has a
Tilting feature where you can change the angle of the screen to make it easier to shoot from waist or over-the-head levels. On the other hand, Nikon D3X has a fixed type screen which provides less flexibility in shooting positions compared to D780.
