So i've had my 70-200f4 IS since the day it came out and its been perfect. However, recently about every 3rd or 4th time i use it with the IS it looks like theres a squirrel on coffee with a jackhammer deciding what the IS does. The image really shakes that much. Far more than not using the IS!
Has anyone had this problem before? Did you seek replacement or repair? If you repaired, how much did it cost?
Thanks for any help.