Does anyone know if the auto focus is much faster in the f/2 version of this lens? How does the focus speed compare to the 85 f1.8? I alreadyown the 100mm macro and am thinking about the possibility of some indoor sports and a couple weddings coming up. I know I get another stop with the f/2, but really wanted to know if it has a faster focus. I tried to see if Bryan made mention of it, but he only comments that both focus very quickly. Appreciate the assistance.


Jayson