My EOS EF 75-300 Ultrasonic lens focus ring has become very stiff to rotate
towards the end of its travel (approaching infinity). The autofucus cannot
override this stiffness and when I focus manually it's strong enough to
change the zoom setting - very annoying. Does anybody know of a fix for this
stiffness ? Is it a common problem with this lens ? I hadn't been using this
lens a lot but I will need to use it a lot on holiday soon and really need
to get the stiffness out - (don't suggest giving it a cold shower!!).