I agree 100% with Ron Shaw. You do have a WONDERFUL lens! Steve Grimes is my repair/installation guru, and I've been a working pro for 40 years. Steve is as wonderful as your lens, and even has vintage shutters, in addition to new. Steve Grimes e-mail <skgrimes@skgrimes.com> Web page {a whole tutoral} www.skgrimes.com

You won't go wrong with Steve.