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Author Message   Ohm Tinkerer Username: Ohm Post Number: 30 Registered: 09-2008 Rating: N/A Votes: 0 Posted on Friday, June 18, 2010 - 09:08 am:    I have my Dad's old canon 100-200mm zoom lens and it has fungus on the inside of the front element, how hard would it be to disassemble the front of the lens and clean the glass, I think I saw one post detailing the disassemble process for FD lenses but I am not seeing it now.