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 A6400 and Sony A6100 side-by-side from the front, back and top in their relative dimensions. Sony A6400 has external dimensions of 120 x 67 x 60 mm (4.72 x 2.64 x 2.36″) and weighs 403 g (0.89 lb / 14.22 oz) (including batteries). Sony A6100 has external dimensions of 120 x 67 x 59 mm (4.72 x 2.64 x 2.32″) and weighs 396 g (0.87 lb / 13.97 oz) (including batteries).
Below you can see the front-view size comparison of the Sony A6400 and the Sony A6100. Sony A6400 has the same height and width with Sony A6100. On the other hand, with a thickness of 60mm, it is 1mm thicker.
Here is the back view size comparison of the Sony A6400 and Sony A6100.
Now lets look at the top view comparison of Sony A6400 and Sony A6100.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Sony A6100 is 7g lighter than the Sony A6400 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 A6400 and Sony A6100 have the same Sony E lens mount and APS-C sized sensors, lenses will not be a differentiator on total size of the system.
Weather Sealing
With its weather-sealed body, we believe that the A6400 has a big advantage over the A6100 which doesn't provide any kind of environmental sealing.
LCD Screen Size and Features
Sony A6400 and Sony A6100's LCD screens have the same diagonal size of 3.00 inches.
Both cameras feature
Tilting screens where you can change the angle of the screen to make it easier to shoot from waist or over-the-head levels.