Olympus-OM
[Top] [All Lists]

Re: [OM] Yellowing of SC coatings

Subject: Re: [OM] Yellowing of SC coatings
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxx>
Date: Fri, 25 Jul 2003 07:09:21 -0400
Moose said:
... Some of the earliest 50/1.4 and 55/1.2 lenses (but no 50/1.8s, I believe) had one or more lens elements using glass with a bit of a radioactive rare-earth element... A byproduct of this,... was that the glass acquired a yellowish cast over time as a byproduct of the radioactive decay. Some other manufacturers had the same problem.
-----------------------------------------------------------------
Yes, other manufacturers had the same problem. Fortunately, Brian Ayling of Oz and owner of a yellowing screw mount Pentax Takumar has devised a universal fix for the problem. See his repair page at:
<http://www.hermes.net.au/bayling/repair.html>

Chuck Norcutt
Woburn, Massachusetts, USA


< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >


<Prev in Thread] Current Thread [Next in Thread>
Sponsored by Tako
Impressum | Datenschutz