My 135L is my "macro" lens for medium big items. It's excellent. I use my 50mm CM for "real" macro and then really only to 1:2. I never shoot 1:1. Too demanding really vs. my interest level.
I can shoot frame filling shots of things as small as a dragonfly (about 50mm wide) with my 135L. The nice thing is also I tend to use the 135L as my no-tripod macro. I shoot my 50mm CM exclusively on the tripod....usually at f/11 to f/16 for adequate DOF.



