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 Canon G1 X III and Sony A9 side-by-side from the front, back and top in their relative dimensions. Canon G1 X III has external dimensions of 115 x 78 x 51 mm (4.53 x 3.07 x 2.01″) and weighs 399 g (0.88 lb / 14.07 oz) (including batteries). 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).
Below you can see the front-view size comparison of the Canon G1 X III and the Sony A9. Canon G1 X III is clearly the smaller of the two cameras. Its body is 12mm narrower, 18mm shorter and 12mm thinner than Sony A9. As you can tell, actually this is not a fair size comparison since Canon G1 X III has a built-in lens but Sony A9 doesn't. Once you put a lens on A9, its thickness will increase significantly.
Here is the back view size comparison of the Canon G1 X III and Sony A9.
Now lets look at the top view comparison of Canon G1 X III and Sony A9.
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Canon G1 X III is significantly lighter (274g ) than the Sony A9 which may become a big advantage especially on long walking trips.
Again, this comparison may not be very useful in real life as we are comparing the weight of a camera with a built-in lens to the body-only weight of an interchangeable lens camera. Once you put a lens on A9, the total kit will weigh much higher.
Weather Sealing
Both the G1 X III and the A9 have weather sealings in their bodies, making them resistant to water and dust.
LCD Screen Size and Features
Canon G1 X III and Sony A9's LCD screens have the same diagonal size of 3.00 inches.
Sony A9 features a
Tilting-only screen which is mostly only good for shooting from waist or over-the-head levels. On the other hand, Canon G1 X III sports a
Fully Articulated screen which is more flexible and useful, especially for taking selfies and video.