David Martin wrote:
Blackrapid sling which comes in both right- and left-handed versions. Allows your shoulder to bear the weight, with the camera hanging upside down at your side. I've used mine with Nikon D500 + 200-500mm lens, and with Canon R5 + 100-500mm lens, with the strap attached to the tripod mount of the lens. With a smaller/lighter lens, attach the strap to the camera.