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 A6100 and Sony A9 II side-by-side from the front, back and top in their relative dimensions. 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). Sony A9 II has external dimensions of 129 x 96 x 76 mm (5.08 x 3.78 x 2.99″) and weighs 678 g (1.49 lb / 23.92 oz) (including batteries).
Below you can see the front-view size comparison of the Sony A6100 and the Sony A9 II. Sony A6100 is clearly the smaller of the two cameras. Its body is 9mm narrower, 29mm shorter and 17mm thinner than Sony A9 II.
Here is the back view size comparison of the Sony A6100 and Sony A9 II.
Now lets look at the top view comparison of Sony A6100 and Sony A9 II.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Sony A6100 is significantly lighter (282g ) than the Sony A9 II 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 Sony A9 II has a Full frame sensor and Sony A6100 has a smaller APS-C sensor, Sony A6100's lenses for a similar focal length and aperture will generally be lighter and smaller than the Sony A9 II lenses.
Weather Sealing
Thanks to the weather-sealed body of the A9 Mark II, you can use this camera with more confidence under conditions where there is risk of exposure to water and dust compared to the A6100.
LCD Screen Size and Features
Sony A6100 and Sony A9 II'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.