billnikon wrote:
No, never had that problem. Of course I bought the Nikon 200-500 which has given me NO PROBLEMS over THOUSANDS of exposures. Good luck with your lens though. It is maddening when a lens acts up in the field, you could miss something important that will never happen again, that's why I shoot only Nikon. I never miss an important moment.
I'm sure the OP appreciates you rubbing it in his face. Geesus Bill, have you no shame or compassion?