And, it will show in as little as 500 years..... BTW, do you guys who have the screw mount 50/1.4 where your dosimeter when using it?
Ciao, graywolf ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, December 21, 2001 2:39 PM Subject: Shift in lens tone rendering > Flavio, > > I have read that a lens that uses rare-earth elements (such as scandium or > cobalt) in its glass or coating will change color as the radioactive coating decays. Apparently this is truer of old lenses, or at least old lenses have aged enough that we can now see the effects. Presumably the same will happen over time to a modern lens that uses rare earth. Zenitar claims to use rare earth; I don't know how many other lens makers use it. > > Paul Stregevsky > > > -------------------------------------------------------------------- > mail2web - Check your email from the web at > http://mail2web.com/ . > - > This message is from the Pentax-Discuss Mail List. To unsubscribe, > go to http://www.pdml.net and follow the directions. Don't forget to > visit the Pentax Users' Gallery at http://pug.komkon.org . - This message is from the Pentax-Discuss Mail List. To unsubscribe, go to http://www.pdml.net and follow the directions. Don't forget to visit the Pentax Users' Gallery at http://pug.komkon.org .
