I read this comment on B&H about the Nikon strap:
"Nicely made, narrow strap. But it is only 48" long end to end before you attach your camera. So unless you only want to wear it around your neck and have your camera sit high on your chest, find a different strap. Trouble is that most of the narrow straps are also on the short side."
I use the Op Tech with my Nikon F6 and it is incredible as to how much lighter and more comfortable it makes the camera feel on my shoulder. My M5 w/ Nokton 50 1.1 is a heavy set up and the Nikon strap u link to looks too thin to be comfortable.