Macro extension tubes are really handy to have around. They allow you to throw off your lens’ minimum focus distance so that you can get even closer to a subject. They basically turn any lens into a macro lens. If you have an electronic lens, then you will need extension tubes that carry the signal from your lens to your camera and vice versa.
Vivitar has come out with some inexpensive macro extension tubes to fit most any camera, including Canon, Nikon and Sony.