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 A7S III and Sony FX3 side-by-side from the front, back and top in their relative dimensions. Sony A7S III has external dimensions of 129 x 97 x 81 mm (5.08 x 3.82 x 3.19″) and weighs 699 g (1.54 lb / 24.66 oz) (including batteries). Sony FX3 has external dimensions of 130 x 78 x 85 mm (3.07 x 5.12 x 3.35″) and weighs 716 g (including batteries).
Below you can see the front-view size comparison of the Sony A7S III and the Sony FX3. Sony A7S III is 1mm narrower and 4mm thinner than Sony FX3 but it is also 19mm taller.
Comparison image of the Sony A7S III and the Sony FX3 Size, Weight and External Dimensions - Front View
Here is the back view size comparison of the Sony A7S III and Sony FX3.
Comparison image of the Sony A7S III and the Sony FX3 Size and Weight - Back View
Now lets look at the top view comparison of Sony A7S III and Sony FX3.
Top View Comparison image of the Sony A7S III and the Sony FX3 Size
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Sony A7S III is 17g lighter than the Sony FX3 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 A7S III and Sony FX3 have the same Sony E lens mount and Full frame sized sensors, lenses will not be a differentiator on total size of the system.
Weather Sealing
Both the A7S III and the FX3 have weather sealings in their bodies, making them resistant to water and dust.
LCD Screen Size and Features
Sony A7S III and Sony FX3's LCD screens have the same diagonal size of 3.00 inches.
