To obtain certain lighting effects, you sometimes need to attach things to your flash head, such as gel filters or bounce cards. Normally, this involves fussing around trying to strap things down with a rubber band or opting to gum up your equipment with sticky-backed velcro or tape. Instead you can create a cheap speed strap that’s both easily removable and simple to attach things to.
There are commercial solutions for this that can be a bit pricey, but Jake O’Connell found a way to make one on the cheap for about $3. Velcro came out with something called a “Design Strap”, which is basically a zip-tie with Velcro on one side. Put a rubber band around your flash and then wrap a couple Design Straps over that and you have an attachment system that stays put, comes off easy, and is simple to attach things to. Just add velcro to your gels, bounce cards or whatever and you can quickly affix them to the flash however you like.