Thanks RJ. Your offer is appreciated, but I do have a 3rd party extended warranty from the vendor. It's really just a matter of my letting go of it for any period of time!

BTW, could you recommend a resource where I could get a better sense of what's inside this lens? It's all magic to me.

Thanks RJ. Your offer is appreciated, but I do have a 3rd party e tended warranty from the vendor. It's really just a matter of my letting go of it for any period of time!

BTW, could you recommend a resource where I could get a better sense of what's inside this lens? It's all magic to me.

I've had just this same issue with this lens. Switching camera bodies makes no difference, even after repeated contact cleaning.

I'll try the alcohol solution, but I think it's going to get serviced.