Bet you've never seen one of these critters. They are about 0.5mm long. [URL]http://www.pbase.com/image/29054127[/URL] [URL]http://www.pbase.com/image/29054128[/URL] It took all 3 extension tubes + the 2x TC on top of the incredible 28-135 IS to get these shots. Not my best macro work, but it does push me a little closer toward the 65mm MP-E lens. [URL]http://www.vividlight.com/articles/2914.htm[/URL]