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 Nikon D3X 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). Nikon D3X has external dimensions of 160 x 157 x 88 mm (6.3 x 6.18 x 3.46″) and weighs 1260 g (2.78 lb / 44.45 oz) (including batteries).
Below you can see the front-view size comparison of the Canon G1 X III and the Nikon D3X. Canon G1 X III is clearly the smaller of the two cameras. Its body is 45mm narrower, 79mm shorter and 37mm thinner than Nikon D3X. As you can tell, actually this is not a fair size comparison since Canon G1 X III has a built-in lens but Nikon D3X doesn't. Once you put a lens on D3X, its thickness will increase significantly.
Comparison image of Canon G1 X III and Nikon D3X Size, Weight and External Dimensions - Front View
Here is the back view size comparison of the Canon G1 X III and Nikon D3X.
Comparison image of Canon G1 X III and Nikon D3X Size and Weight - Back View
Now lets look at the top view comparison of Canon G1 X III and Nikon D3X.
Top View Comparison image of Canon G1 X III and Nikon D3X Size
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 (861g ) than the Nikon D3X 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 D3X, the total kit will weigh much higher.
Weather Sealing
Both the G1 X III and the D3X have weather sealings in their bodies, making them resistant to water and dust.
LCD Screen Size and Features
Canon G1 X III and Nikon D3X's LCD screens have the same diagonal size of 3.00 inches.
On the other hand, Canon G1 X III sports a
Fully Articulated screen which you can change the angle and position of the screen almost freely, making it possible to shoot from waist or over-the-head levels, and especially very useful for shooting selfies and video. Nikon D3X's LCD screen is a fixed type which provides almost no flexibility in shooting positions compared to G1 X III.