Best Macro Lenses: Unbiased Review of 8 Lenses, and it turns out that one of the cheapest options is actually one of the best quality!
Cheat Sheet: Macro Lenses - How much magnification do you need>
Learn Photography: Macro Lenses
Check out these macro lens quick tips from Canon. It's close-up photography made easy! Clean design look.
See what’s possible with a macro lens and learn some DSLR camera photography tips from Canon.
Best Canon Macro Lenses for Nature and Studio Photography | Smashing Camera
The Wonderful World of Macro Lenses: Close-Up Photography Lesson #4
Macro Lens Buying Guide: What to look for along with some suggestions for different price points.
Best macro lens for Canon and Nikon DSLRs
Macro Photography Lens Buying Guide