IOW at MFD to get MM, which does make the 70-200 f/4 IS a good flower and butterfly lens (on a crop body; with a larger sensor you need more MM, at least that's my impression after changing from a 500D to a 5D2, letting the 100mm macro bubble to the top of my "want" list).
Ciao, Colin
I'll prob. be getting an extension tube to increase magnification.