ProMediaGear SS2 Quick Release Strap Adapter - This is an amazing item that allows the camera and lens to be attached to a BlackRapid strap using a ProMediaGear Arca plate on your lens foot. It has a push button quick disconnect to attach to the adapter. Large lenses mounted on camera should never be carried using a strap attached to the camera as it places considerable stress from the weight on the lens mount. This allows the camera and lens to be at your side for comfort and quick access while making sure the lens supports the camera’s weight instead of the other way around. That can be done with a threaded screw that comes with the regular Black Rapid strap. What makes this so amazing is that when you go from carrying and using handheld to place on the tripod head, all you do is press the button and it pops off the plate. Otherwise you would have to thread the screw in each time on/off and remember to check it periodically to make sure it doesn’t come loose. If you try this, you won’t ever go back to a threaded attachment.