sigma 150? can 100?

[griffithimage]

Hi, has anyone had any experience with the sigma 150 macro? I was about to buy the canon 100mm macro for coral macros but was wondering how the sigma performed? Is the extra length any advantage with tank shots?

 

[BlueCorn]

Both are capable of 1:1 magnification and are sharp lenses. The 150 gives you a longer working distance, helpful if you've got a deep tank. It will also give you better bokeh.