[Leica] DON: Concave front element

[Frank Filippone]

 LED lights are usually pretty limited in spectral output.....  If the lED does not work, try good old fashioned daylight..... It may be slower, but it will work.....
 
Frank FilipponeRed735i at verizon.net
 
 
-----Original Message-----
From: venchka via LUG <lug at leica-users.org>
To: lug <lug at leica-users.org>
Cc: papatorry <papatorry at etex.net>
Sent: Sun, May 26, 2019 3:49 pm
Subject: [Leica] DON: Concave front element

Don,
Sorry! I forgot the most critical bit of information about the lens.
Concave front element.
AND!: Yes, the glass turns a pale yellowish color over time. So I put the
lens under an IKEA LED table lamp. Someone on the internet said the lamp
emitted sufficient UV light to reverse the yellowing. So far it seems to
work.

Wayne



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