Hi, Nathan! just my two cents... i don't know almost nothing about the 60mm, because of the EF-S mount if i well remember, this mount don't fit on my cameras (10D, 1V, eos 3)and there's a risk for the mirror (am i wrong?) but i'm a fully satisfied owner of an ef 100mm 2.8 usm since a couple of years... i use this lens for almost all my macros in my portfolio, take a look, maybe it could be helpful for your choice;) IMHO, it's a very good lens: fast, clear and very detailed. right on these days, my birthday it's approaching, and i'm seriously thinking to buy a set of extension tubes from Kenko, to increase the magnification Consider also the MP-E 65 2.8 macro,the price, it's almost double of the 100mm, but it's a killer lens, pretty difficult to manage with the focus, but worth a look! I hope this could help u;) Ciao Davide
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