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Author Message   Brandon J. Rating: N/A Votes: 0 Posted on Thursday, April 29, 2004 - 10:17 pm:    Hi, First of all thanks. I got the lens to come out of the mount but i still am having some trouble, I'm I to understand that the front element(s) come out between the two knurled rings? If so I am having trouble getting it to thread out, and I don't want to force anything. Should the black tube come out of the chrome front? Again thanks, BTW there are two numbers engraved in the black lens tube, there is a 53 on one side and what looks like 57,9 on the other, is one the true focal length? Brandon