[Leica] Re:was summarit, now lens lubes

[dpost at triad.rr.com (Dan Post)]

That sounds like the infamous 'fungus damage' one hears about- while I 
am not a mycologist by any means, I seem to have read that the lichen 
that grows on rock, and slowly breaks it down , is a symbiotic relation 
between a fungus and an algae. I would not be surprised if the fungal 
myceliium threading through the organic oils on a lens were to release 
an acid that etched the glass. If many rocks are basically silicates of 
one form or another, I am sure the highly refined silicas in Leitz 
oprical glass are a gourmet delight to any enterprising fungus! Yum!
Dan

Summicron1@aol.com wrote:

>speaking of lubes evaporating and resettling, here's something I didn't 
>know:
>
>Last year I bought an M2 with an elmar 2.8/50mm lens, old style, and sent 
>both to sherry krauter because the camera was desperately in need of TLC 
>and the 
>lens had an inernal haze that I figured sherry could wipe off, no sweat.
>
>uh, nope.
>
>Turned out, she said, that some of those lubes not only evaporate and 
>resettle, but they etch the glass surface, making wiping an 
>impossibilility. 
>Fortunately, Sherry has a replacement element in stock and for a larger 
>than expected 
>sum of money, it is now in my lens doing lovely work.
>
>But, be advised, sometimes haze ain't.
>
>c trentelman
>In a message dated 10/16/04 1:32:48 PM, lug-request@leica-users.org writes:
>
>
>  
>