Archived posting to the Leica Users Group, 2003/03/28
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Austin I mat know nowt about the Canon or Asahi Pentax "Yellow" lenses, but I know lots about the Kodak Lanthanum-Thorium lenses. They started out fairly water clear, but over the long years, they turned color. Amber is the closest color I can think of. Like a very watered down Scotch, The color shift is well within the color correction capabilities of Kodak or Fuji processing machines. Whites remain pure white, which is my criterion. Color transparencies may be a different story, though CC filters should be able to take care of the shift. If the destroyed lens was otherwise OK, I consider it a stupid waste. Your sense of values may differ. Jerry Austin Franklin wrote: > Hi Martin, > > I'm not sure, but I think that article may be wrong. I believe the lenses > were already yellow to start with. The radioactive material could be > Thorium, as is used in a Canon 35/2.0 lense, and documentation I have says > it was yellowish to begin with... The 35/2.0 Canon lense (Thorium version) > is a legendary B&W lense, BTW. > > Regards, > > Austin > > > -----Original Message----- > > From: owner-leica-users@mejac.palo-alto.ca.us > > [mailto:owner-leica-users@mejac.palo-alto.ca.us]On Behalf Of Martin > > Howard > > Sent: Friday, March 28, 2003 3:03 PM > > To: Leica Users Group LUG > > Subject: [Leica] Repair technique > > > > > > > > Not for the faint of heart: > > > > http://www.hermes.net.au/bayling/repair.html > > > > M. > > > > -- > > To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html > > -- > To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html