So you should think in advance what I have done, if you want to have the monitor removed as close to the wall or far. Because if you swung the device, the viewing angle, and then still the space is bounded by a wall on one or two sides, one encounters any of these changes. If, for example sitting on a couch, one might indeed look more straight and not sideways on the screen. Although the same viewing angle can be adjusted, there are two joints, but the BS is then still not in the center.
My mother wanted the BS at the foot of her bed in her super small summer cottage. And on the right is just the wall. A 24 "BS is exactly as wide as the box. Pictures will follow the end of March, beginning of April.
For the inaccurate statement I draw a star from, although that is very hard because for the price is the holder according to my inspection properly, but not extendable and has only two joints, three would be optimal.
Why the BS are in inches here, is beyond me. Important is the max. Weight and the hole spacing VESA.