getting more from the Canon 100mm macro?

Hi,

I enjoy trying to take Macro's of the corals within my reef tank, just wondering though if its possible to use tubes or some other means with my 100mm macro to get greater than 1:1 shots with it?

I did look at the MP-E 65, but the working distances are so small most of my corals are too far away from the glass to use it

Cheers, Shelton.

Set of Kenko tubes will take you up to about 2:1 with reduced working distance. A x2 converter will take you to 2:1 with no loss of working distance.