Last night I was browsing auctions and this one from Auckland
http://www.trademe.co.nz/Browse/Listing.aspx?id=294463290
mentions that the lens has always been kept in a low-humidity case.
This would be as an anti-fungus precaution. Auckland has a sub-tropical
climate, surrounded by ocean, and such a precaution would be a very good
idea.
To recap, fungus (on lenses or anywhere else) is a microscopic plant
without chlorophyll. It spreads through the dissemination of microscopic
spores; for example the blue dust from mouldy bread is millions of fungal
spores. Some species of fungus can and do grow on the surface of camera
lenses.
Fungi need water in order to grow; not much, what comes in through the
atmosphere is enough. So having lenses in a dessication cabinet is a very
good idea. In the tropics it is mandatory - microscopes stored outside such
cabinets are rendered useless within months due to fungous growths on the
glass, for example.
Who amongst us stores their lenses in such a cabinet?
Brian Swale.
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