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I have an SMC Pentax-M 135mm f/3.5 lens that I'd like to use on my ME Super, but it's got quite a bit of fungus on it, so I don't dare to use it before it's been cleaned in fear of the fungus spreading.
Is the lens good enough to make it worth cleaning it, or should I just give it up?
It's been in my windowsill for a few weeks, but it looks like the sun hasn't gotten much of the fungus, so if probably have to open it up to clean it.