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I have a Minolta Rokkor-x 200mm telephoto lens with fungus

I have a Minolta Rokkor-x 200mm telephoto lens with what looks like fungus inside. It's white and appears to be cloudy spots along one of the inner rings as you look through the far end or ouside of the barrel and look in. I heard the mildew leaves permanent damage so I don't know how far gone this is. I never really inspected the lens before and had it a number of years. Is it relatively cheap to have someone clean it or could I do it myself? How much would it cost if I had it done?

-Ridley

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Lens fungus is really common and it's not cost effective to repair. Even if the fungus is removed then the multicoatings are permanently damaged.

The good news is that until the fungus becomes pretty severe the image quality doesn't suffer much as most photos use the lens stopped down to some extent and this means that if the centre of the lens is clear then there's nothing to block the light paths.

Unfortunately it does tend to spread, so keep affected lenses in a separate camera bag to the rest and if you can afford to do so then throw them away and replace your camera bag as it will be loaded with microscopic spores waiting to attack more lenses. Making sure that your camera and lenses are completely dry and free of condensation before storing them until next used will prevent reoccurence.

Posted on Jun 23, 2009

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This is not an exhaustive answer, as there are entire books on the subject, but hopefully it's been of help to you.

Please take a moment to rate my answer or to add a comment if my answer has left you with unanswered questions which need to be resolved before you can rate my reply.

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