HiYa

At 02:49 AM 21/11/2002 +0100, you wrote:
Date: Wed, 20 Nov 2002 09:39:38 -0800
From: "Dr Paul D. Jaruszewski" <[EMAIL PROTECTED]>
Subject: EOS Fungus

Any tips on reducing lens fungus. I have been spending more money on my
lenses lately with the thought that this investment would outlast the bodies
I have been using. Now I am wondering about the life expectancy of my
lenses.

well I've got a few valuable ones too, and I've been storing them in a reasonably sealed cabinate with a a tub of dessicant (drying agent) which collects the humidity, and leaves it bound as a jelly looking substance in the bottom of a pot (that it comes in)

Humidity is the thing which fungii need to grow, temperature of course helps, but simply being cold is not going to preclude them. Keep the humidity below about 60% and they will not grow. Less than 30% is not so ideal, as this actually will effect the lubricants in the lens.

I bought a digital hygrometer (for measuring the humididty) for about $20 and put that in the cabinet. It keeps a record of Max and Min humiditys, so I can see how effective my drying agent is.

the tubs are about $3 for a 3 pack, and one lasts me about a year.

this seems to keep me within the 30% -> 50% every time I glance at it (clear container :-)


back in Australia I also experimented with a electric dry cabinet (as it was cheaper than buying one)

you may find this thread valuable

http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&threadm=8edjca%24pd928%40inetbws1.citec.com.au&rnum=1&prev=/groups%3Fas_q%3Dpeltier%2520effect%2520humidity%2520fungus%26safe%3Dimages%26ie%3DISO-8859-1%26lr%3D%26hl%3Den


HTH

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