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 Nikon Z6 III and Sony RX1 side-by-side from the front, back and top in their relative dimensions. Nikon Z6 III has external dimensions of 139 x 102 x 74 mm (5.47 x 4.02 x 2.91″) and weighs 760 g (1.68 lb / 26.81 oz) (including batteries). Sony RX1 has external dimensions of 113 x 65 x 70 mm (4.45 x 2.56 x 2.76″) and weighs 482 g (1.06 lb / 17.00 oz) (including batteries).
Below you can see the front-view size comparison of the Nikon Z6 III and the Sony RX1. Sony RX1 is clearly the smaller of the two cameras. Its body is 26mm narrower, 37mm shorter and 4mm thinner than Nikon Z6 III. As you can tell, actually this is not a fair size comparison since Sony RX1 has a built-in lens but Nikon Z6 III doesn't. Once you put a lens on Z6 Mark III, its thickness will increase significantly.
Comparison image of the Nikon Z6 III and the Sony RX1 Size, Weight and External Dimensions - Front View
Now lets look at the top view comparison of Nikon Z6 III and Sony RX1.
Top View Comparison image of the Nikon Z6 III and the Sony RX1 Size
Weight is another important factor, especially when deciding on a camera that you want to carry with you all day.
Sony RX1 is significantly lighter (278g ) than the Nikon Z6 III 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 Z6 Mark III, the total kit will weigh much higher.
Weather Sealing
With its weather-sealed body, we believe that the Z6 Mark III has a big advantage over the RX1 which doesn't provide any kind of environmental sealing.
LCD Screen Size and Features
Nikon Z6 III's 3.20" LCD screen is slightly larger than Sony RX1's 3 screen.
Moreover, Nikon Z6 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. On the other hand, Sony RX1 has a fixed type screen which provides almost no flexibility in shooting positions compared to Z6 Mark III.