MT Shooter wrote:
I use the OpTech Pro Loop Straps for my D800's with long lenses, including the Sigma 150-500mm zoom. I also use the OpTech Double Sling when I need to carry two bodies with lenses on them. Both straps are extremely comfortable to wear and quite reasonably priced. And they are made in the USA of USA components!
So far I have the OpTech on the camera and left the strap that came with the Sigma on it. I usually don't use the camera strap with the Sigma attached. I usually cradle it instead with the strap as drop insurance.