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Author Message   Scott Tinkerer Username: Scott Post Number: 113 Registered: 07-2006 Rating: N/A Votes: 0 Posted on Monday, September 27, 2010 - 08:28 am:    My first guess is that yours is a three-element lens design, and that the front and middle lens element casings are stuck together. So, what you are doing is not focusing the lens, but rather unscrewing the middle element out of the shutter housing-- with the stuck front element attached. Can't you see and touch the metal shutter blades when the lens comes off? If I am right, then it is a fairly easy repair. Will need some solvents (like denatured alcohol), a bit of new grease, and a really tiny flathead screwdriver.