[Leica] OT: Fixing radioactive lenses

[len-1 at comcast.net (Leonard Taupier)]

Thanks Chris
I stopped using the window sill. I've been putting the lens in the  
sun when it's bright, but most of the time I've been using a BLB  
blacklight bulb. It's only UVA. I don't know which wavelength is most  
effective. I could buy a UVB suntan lamp but I won't spend the money.  
If what I'm doing doesn't work I'll just continue to shoot b&w with  
the lens and be very happy.

Len


On Nov 8, 2007, at 11:16 AM, Chris Saganich wrote:

> I believe low-E glass coatings suppress infrared, either way those  
> coatings don't do much for UV.  The UV you would need to reverse  
> the coloration would be quite a bit more then found on a  
> windowsill.  About one month continuous 24/7 exposure would do the  
> trick.  Best to get a UV lamp and a tinfoil lined box.
>
>
> Chris Saganich, Sr. Physicist
> Weill Medical College of Cornell University
> New York Presbyterian Hospital
> chs2018@med.cornell.edu
> Ph. 212.746.6964
> Fax. 212.746.4800
> Office A-0049
>
>
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