A high-end macro lens for your camera can easily run upwards of a thousand dollars, but you can make a super-simple macro lens for a few bucks out of old binoculars.
If you have a pair of old binoculars laying around and a roll of electrical tape, you'll be able to complete your DIY macro lens with no cash outlay. If you're short of both, you'll need to keep an eye out for some old binoculars at a garage sale or thrift store.
Your total cost for the project should be under $US5 or so with some careful secondhand shopping. Check out the video below to see just how easy it is to scavenge the parts from some old binoculars to make a poor man's macro lens:
What you end up with is no substitution for a Nikon Micro-Nikkor lens, but a little compromise is in order when you're spending 1/200th the amount and using electrical tape to hold things together. If you have your own clever, and hopefully thrifty, photography hacks to share, sound off in the comments below.
DIY Macro Lens Made from Binoculars [MetaCafe]