I'm interested in picking up a 45-175, but had a question that I'm hoping some owners of the lens could answer. I'm mainly interested in shooting the lens in medium burst mode so that the camera retains auto-focus, but I want to know if the lens is capable of delivering enough FPS during shooting in burst mode. I own a 100-300, but when shooting it in burst mode it never shoots as fast as my 35-100 does (this is a well known and documented issue with the 100-300). Does the 45-175 suffer from this same issue, or does it shoot at the full FPS for the selected burst mode? Thank you for your help.