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'Crystals' inside my Canon EF 100mm Macro USM Lens

Started Apr 28, 2015 | Discussions thread
(unknown member) Veteran Member • Posts: 5,590
Re: 'Crystals' inside my Canon EF 100mm Macro USM Lens

Landscapeforfun wrote:

SarahBK wrote:

Landscapeforfun wrote:

Looks like a classic case of fungus to me. Not sure if the lens is salvageable or not.
--
-Adam
https://www.flickr.com/photos/90719248@N04/

Did you full-view the picture?
I'd have imagined the hyphae would have been so much thinner, and being a living organism it would grow over a long period of time.. and wouldn't be so isolate..

I don't see a whole lot of other options for what it could be. I'm sure if you put it in a dark damp place it will spread. Your best bet is to have it repaired ASAP before it gets any worse or etches the glass.

I'm afraid that lens may have had it.  The fungus will have damaged the coating and/or the cement between the lens elements.  Re-coating is not really practical or cost effective so the only hope is replacement of the affected lens groups - but with the cost of those and the labour in fitting and recalibrating the lens .................... !  It may be cheaper to write the whole lens off and to buy a replacement.  Might your insurance cover it perhaps?

You need to be mindful that if it has affected this lens it could also have spread to others.  Get everything into the driest place you can find and google 'how to protect camera equipment against humidity'.

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