OP/TECH USA 1301322 Connectors for Camera Bag

Q: How strong is this thing? Can it hold Canon 1DX + Canon 70-200 2.8 IS II lens? Thanks!

I have a 1D MKIV and 70-200 2.8 IS: I just came back from Fashion Week in Prague and Paris. It is rated for and capable of holding it. However, I do not trust my camera to this alone, as the entire tether system is only as strong as the weakest point. As your system breaks the $10k mark, I would use 550 Paracord instead of this, as it is rated to 550 lbs breaking. When I use these adapt-its, I also have a braided stainless steel tether cord attached to my belt and a BlackRapid FastenR (FR-3) on the bottom of my camera body. This prevents dropage from strap breakage and theft. I hope this helps.

Q: Do they fit a Nicond5000?

If you are asking about Nikon D5000 yes although if plastic is too stiff to fit in the strap connector on camera put them in a cup of hot tap water for a minute or 2 and it softens them up enough to get them through the opening.