Archived posting to the Leica Users Group, 1999/03/25

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Subject: Re: [Leica] Fungus
From: "Gareth Jolly" <garethjolly@bigpond.com>
Date: Thu, 25 Mar 1999 19:44:04 +1100

You might check out this page on fungus:

http://www.chem.helsinki.fi/~toomas/photo/

Gareth Jolly

- -----Original Message-----
From: Christopher Nauta <summarex@hotmail.com>
To: leica-users@mejac.palo-alto.ca.us <leica-users@mejac.palo-alto.ca.us>
Date: Thursday, March 25, 1999 2:40
Subject: [Leica] Fungus


>-
>  Offered to me is a 35/2 with the built-in eyes for the M3. 
>Unfortunately, the rear element has some white, wispy fungus happily 
>living on what appears to be the inside of the rear element. Otherwise 
>perfect, price is 400$ give or take. 
>   The only experience I have with fungus-ridden glass is one of my view 
>lenses- a Goerz 16in tele-megor. I have never seen a noticeable 
>depreciation in the image quality with this lens, however I suspect the 
>size of the format may mitigate the effects anyway. Also the fungus is 
>colorless, and grows in a less lattice-like structure. I have used every 
>reasonable cleaner to remedy this and failed.
>    Is there a chemical or guerrilla tactic to removing fungus, or does 
>the glass need to be polished- likely introducing excess curvature? Even 
>after cleaning, do spores remain in the barrell, waiting for prime 
>conditions to re-infect the glass?
>
>   Fungally,
>       Chris
>-
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