Archived posting to the Leica Users Group, 2019/05/26
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]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 _______________________________________________ Leica Users Group. See http://leica-users.org/mailman/listinfo/lug for more information