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<blockquote data-quote="Clovishound" data-source="post: 822586" data-attributes="member: 50197">The only thing I would advise is to call and find out what the cost is likely to be. Then check out the price of a used copy of this lens. I had a 105mm micro with a problem. The estimated cost to have it repaired was more than the cost of a used in excellent to like new condition. The other issue is if the fungus has progressed beyond a certain point, there may be damage to the lens coating. This may affect the performance of the lens after cleaning, although the picture you posted looks like it isn't too bad.I would look to the storage of your equipment. Storing them in high humidity conditions can ultimately lead to this condition. My dad lived in coastal Florida, and stored some of his equipment in an un - air conditioned workshop. Actually, prior to the late 60s, there was no air conditioning in the house either. Anyway, many of his lenses suffered to varying degrees with fungus. I got all of his equipment when he passed in the late 80s. He had a really nice 50mm F1.4 lens that I had disassembled and cleaned by a local independent repairman. It was a great performer afterwards.</blockquote>

[QUOTE="Clovishound, post: 822586, member: 50197"] The only thing I would advise is to call and find out what the cost is likely to be. Then check out the price of a used copy of this lens. I had a 105mm micro with a problem. The estimated cost to have it repaired was more than the cost of a used in excellent to like new condition. The other issue is if the fungus has progressed beyond a certain point, there may be damage to the lens coating. This may affect the performance of the lens after cleaning, although the picture you posted looks like it isn't too bad. I would look to the storage of your equipment. Storing them in high humidity conditions can ultimately lead to this condition. My dad lived in coastal Florida, and stored some of his equipment in an un - air conditioned workshop. Actually, prior to the late 60s, there was no air conditioning in the house either. Anyway, many of his lenses suffered to varying degrees with fungus. I got all of his equipment when he passed in the late 80s. He had a really nice 50mm F1.4 lens that I had disassembled and cleaned by a local independent repairman. It was a great performer afterwards. [/QUOTE]

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