Re: Yellowing of screwmount Super-multicoated 50/1.4s
The yellowing of some of the old lenses is caused by the radiation of the slightly radioactive materials (like thorium glass) which are used to make these lenses. I would not worry about the radiation but about the color shift on the pictures made with the lens. Some have said it is the lens cement which yellows... but I believe it is the lens glass itself which changes color. I remember reading that diamonds are sometimes colored with radiation as well... You'll find a lot of info about this if you do a net search (for example pentax radioactive yellowing). Antti-Pekka --- * Antti-Pekka Virjonen * Fiskarsinkatu 7 D * GSM: +358 500 789 753 * * Computec Oy Turku* FIN-20750 Turku Finland * Fax: +358 10 264 0777 *
Re: Yellowing of screwmount Super-multicoated 50/1.4s
I forgot to include the address to the 50/1.4 yellowing repair site ;-) http://www.hermes.net.au/bayling/repair.html Easy fixes with common tools! Antti-Pekka --- * Antti-Pekka Virjonen * Fiskarsinkatu 7 D * GSM: +358 500 789 753 * * Computec Oy Turku* FIN-20750 Turku Finland * Fax: +358 10 264 0777 *
Re: Yellowing of screwmount Super-multicoated 50/1.4s
Oh no. Not that again. The horror, the horror... At 10:44 AM 10/2/2002 +0300, you wrote: I forgot to include the address to the 50/1.4 yellowing repair site ;-) http://www.hermes.net.au/bayling/repair.html Easy fixes with common tools! Antti-Pekka --- * Antti-Pekka Virjonen * Fiskarsinkatu 7 D * GSM: +358 500 789 753 * * Computec Oy Turku* FIN-20750 Turku Finland * Fax: +358 10 264 0777 *
Re: Yellowing of screwmount Super-multicoated 50/1.4s
Thank you very much for the information, Antti-Pekka. Tom From: Antti-Pekka Virjonen [EMAIL PROTECTED] Reply-To: [EMAIL PROTECTED] Date: Wed, 02 Oct 2002 10:44:45 +0300 To: [EMAIL PROTECTED] Subject: Re: Yellowing of screwmount Super-multicoated 50/1.4s Resent-From: [EMAIL PROTECTED] Resent-Date: Wed, 2 Oct 2002 03:46:31 -0400 I forgot to include the address to the 50/1.4 yellowing repair site ;-) http://www.hermes.net.au/bayling/repair.html Easy fixes with common tools! Antti-Pekka --- * Antti-Pekka Virjonen * Fiskarsinkatu 7 D * GSM: +358 500 789 753 * * Computec Oy Turku* FIN-20750 Turku Finland * Fax: +358 10 264 0777 *
