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Author Message   Bojan Tinkerer Username: Bojan Post Number: 9 Registered: 10-2009 Rating: N/A Votes: 0 Posted on Tuesday, December 13, 2011 - 02:49 pm:    Guys, I dismantled and re-assembled the lens without problems.. the only tricky part was adjustment of focus assembly, but this is also not a problem and no special tools are needed (only camera with live feature and computer screen to watch the focus) In my case, it was not the fungus but fogging - it seems the middle element is oxidised (meaning coating is damaged by moisture) and the lens is a bit affected - I am using it for astro-photography and ANY contrast deterioration is most unfortunate. Otherwise the lens functions perfectly