I just picked one of these up today from a local seller for a good price. The lens itself is in great shape, but I'm having trouble seeing any benefits of the IS system, which has me wondering if the IS is working.
So my question is, does the IS mechanism make any noise on your copy? My lens is silent as can be, and I'm not seeing much of a difference in the viewfinder with IS on or off.
One other thing, the lens still auto focuses with the switch set to MF. Not sure if this is normal or not. Any help is much appreciated.
-Kevin




