Cameras cost a bomb, really good lenses cost an atom bomb, and even accessories ain't cheap.
But has anyone got any photographic accessories that they've made for nothing (or next to nothing) that they find really useful?
Care to share your inventive genius?
Here, for starters, is one of mine - a simple reflector. I cut an A4-sized chunk of particularly stiff cardboard from the side of a box and, using contact adhesive, covered it with crinkled aluminium baking foil. It makes a great little reflector that can be hand-held to direct diffuse light just where I want it in macro shots and portraits. And it's small enough to slip into the laptop pocket of my carrying bag.
Any more ideas out there?