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 Sony A9 and Nikon Z5 side-by-side from the front, back and top in their relative dimensions. Sony A9 has external dimensions of 127 x 96 x 63 mm (5 x 3.78 x 2.48″) and weighs 673 g (1.48 lb / 23.74 oz) (including batteries). Nikon Z5 has external dimensions of 134 x 101 x 70 mm (5.28 x 3.98 x 2.76″) and weighs 675 g (1.49 lb / 23.81 oz) (including batteries).
Below you can see the front-view size comparison of the Sony A9 and the Nikon Z5. Sony A9 is clearly the smaller of the two cameras. Its body is 7mm narrower, 5mm shorter and 7mm thinner than Nikon Z5.
Here is the back view size comparison of the Sony A9 and Nikon Z5.
Now lets look at the top view comparison of Sony A9 and Nikon Z5.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Sony A9 is 2g lighter than the Nikon Z5 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 Sony A9 and Nikon Z5 have the same Full frame sized sensor, their lenses for a similar focal length and aperture will be similar in size and weight.
Weather Sealing
Both the A9 and the Z5 have weather sealings in their bodies, making them resistant to water and dust.
LCD Screen Size and Features
Nikon Z5's 3.20" LCD screen is slightly larger than Sony A9's 3 screen.