The micro or macro is a special lens. Does not preform as well as the 100mm f2.0 at 100mm distance. With the micro and ext.tubes, one can copy 35mm slides, if with tripod and hand switch and a back light. Make a holder for the slides. The macro or micro 2D stage from Adorama helps some for macro,micro work. Check out Tokina, save a few $$. POP Photo rated that lens as the best micro EVER tested, about 3 yrs ago. Now, Tokina has the 100mm f2.8 II, improved.





If shooting inside the high school gym action shots( BB,VB) , the 100 f/2.0 will help with 1/2 f/stop improvement over the 2.8. Few lenses work best at their max open f.stop.