Macro lens

I dont think there is a 200 macro but there is 180.    The difference between 100 and 200 is that with the 200 you wont have to be as close to your subject as with the 100 and the 200 will have smaller DOF.

Typically a 100 should be the right choice for someone who does not have a particular need for a 180.

Look into the Tamro 90 which is a cheap and excellent lens. Just he AF is a little slow but thats not a big deal for macro.  I am still on the fence if it was sharper than my Canon 100L ...

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