We love to hear how you use paracord! This is what one customer of ours, Greg Matthews, sent us.
"My favorite use for 550 nylon paracord to date is as a safety device for sling style camera straps.
By way of explanation, there is a type of camera strap called a "sling strap" that is really good for getting a serious camera (like an SLR) from a strap on your hip and into position for shooting quickly. The company BlackRapid was, to my knowledge, the first to produce such a strap. There are many competitors in the market today. The down side of this type of strap is that it is attached to the camera by screwing a plate into the camera's tripod socket. If the screw comes loose (a problem that conventional straps don't have) the camera crashes to the ground. There are products that are sold to provide a safety line to keep this from happening. They tend to be expensive (something like $20. last time I looked).
I've been using paracord to make a loop between the sling strap's clip and one of the camera lugs (the lugs are the usual way of attaching a strap to the camera). I consulted a good technical climber about the type of knot to make and looked at web resources. The major constraint for this loop is that you want a knot that will not loosen when not under load (because the safety strap is just hanging there until it is needed). What I would up using are two knots that have interesting differences and similarities; the uniknot used in fishing and the surgeon's knot. I believe these have different names in different fields (fishing, climbing, woodsmanship).
Both knots start with the two ends of the line (paracord in this case) parallel but running in opposite directions, which is what you want for a neat loop. The uniknot is best explained in two steps. First tie an overhand knot with a few extra turns (aka wraps) in one end of the line with the other end running through the loop in the middle of the overhand knot. Then repeat the process so that the other end of the line also has an overhand knot After tying the two knots you just slide the two knots together.
The surgeon's knot is an overhand knot with at least two wraps of both lines forming one slightly gloppy looking knot. I'm not that knowledgeable about knots. Anyone wanting to try this use of paracord (I'd recommentd 550 or 425) out should use their judgement in deciding what knot is best. Good cameras are pricey things. If anyone finds what they think is a better knot for this purpose, I would be very interested to hear what it is and why it works well for this purpose."
Here is a bit of information on both knots:
Uniknot (AKA Adjustable Knot):
-- Greg Matthews