How to remove fungus from old lens?
fmw wrote: Fungus can be removed from lens elements with a solution of chemicals. The lens must be disassembled to get to the elements with fungus and some special tools are required to disassemble and reassemble the lens. I have restored several high end lenses in this manner. Best to start on cheap lenses like you have before taking on any high end models. If you run into trouble without knowing the way out, you will have destroyed the lens.
True, better off for the purpose just to clean it up from the outside and call it a day. 
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