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

SarahBK wrote:

meland 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/

Looks like fungus to me too. I guess Malta can get pretty humid? How do you store your camera equipment?

Yes it does get humid here. I store my lenses in a case that's filled with silica gel packets.

Your silica gel get's dried out in an oven from time to time?

This did not form while I was here though - it happened either on the plane trip back, or maximum within a week of having flown back (I was checking my lenses even more frequently when there). But they were there that same evening I got home. Since then the crystal shapes have not changed in shape, size, amount or area of the lens affected.

Did the camera equipment travel with you or in the hold? Equipment travelling with you as hand baggage is unlikely to have experienced any conditions that could have caused that. A sudden change in pressure in the hold conceivably could cause separation of a cemented element.

Logic would tell me if it were fungus, it would have formed slowly over time, and since last August when I first noticed them they would have gotten much worse...

If the humidity is reduced the growth of fungus will slow down - but of course the damage that it has caused unfortunately doesn't go away. Anyway I'd have it checked out by a reputable repair facility.