For those of you who like photo hunting, you don't want your camera or lens to be damaged because it hits another object while walking. Especially when I'm using a telephoto lens. This is the correct way..
Source : http://belfot.com/
In both images it looks similar but very different. In the image on the left, the front of the lens is sticking out. Meanwhile, in the image on the right, the front of the lens is hidden behind the body.
It is safer to carry it on the right side because it is safer and more protected. Meanwhile, in the image on the left, there is a greater chance of being hit by a hard object while walking.