How to Get Macro Close-ups with Any Lens
Caleb Pike of DSLR Video Shooter has posted a nice tutorial for turning any old lens into a Macro lens. This process consists of attaching a diopter to the front of your lens, which allows you to focus on objects much closer to the camera than before. Note that these diopters -- which come in different strengths -- can be "stacked" to allow for maximum effect. Caleb explains the process and then shares some example shots:
Thanks for cranking out the jams on the end there, Caleb!
The lenses he's referencing can be found at B&H, they are Hoya Close-Up Kits (which consist of a +1, +2, and +4 diopter packaged together).