I am between the 70-200 f/4L and the 100 f/2.8 USM macro. <br><br> I like the versatility of the 70-200 but I do not have a true <br> macro lens. I currently use the 250D and/or Kenko extension tubes<br> for macro. I usually do not need more than 0.5X and I want some working distance. <br><br> Do you think the 70-200 with extension could become my macro lens <br> until I get the 100 f/2.8 ? Does anybody know what is the working <br> distance with 70-200 at 100mm and 48mm extension (min focus is 1.2 m)?