Do you plan to try it? Yes, I know, that means the sun must shine for
several days on Long Island. :-)
Chuck Norcutt
On 5/2/2011 9:09 AM, John Hermanson wrote:
> interesting, I'd like that to fix my 8mm FE.
>
> ___________________________________
> John Hermanson | CPS, Inc.
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>
> On 5/1/2011 12:15 PM, Chuck Norcutt wrote:
>> I have perhaps one of the few living 65-200/4s that has not been
>> affected by the dreaded cloudy element disease. I've often wondered
>> what was the cause and never seen anything regarding another type of
>> lens that sounded like it might be the same malady... until today.
>>
>> I was just reading the following note on the Kiron Klub list on Yahoo.
>> It certainly sounds similar. Maybe someone with a cloudy 65-200 will
>> give the recommended solution a try. Your guess is as good as mine
>> about the veracity of the solution.
>>
>> Chuck Norcutt
>>
>> -----------------------------------------------------
>> > Has anyone experienced a Kiron 28-85 varifocal with a hazy or cloudy
>> >element near the rear of the lens? If so, did the serial number start
>> >"054". Yes, I have one.
>> > Thanks for your attention. Mel
>> >
>>
>> There is a glass that is doped with a rare earth that will cloud up over
>> time. Don't remember the details except it is a solid state effect
>> caused by electron getting bump up into a quantum level. Like in a laser
>> only they become trapped.
>>
>> The cure is for the glass to be exposed to strong UV. Might want to
>> leave it outside on a sunny day or next to a UV lamp and see what
>> happens. Depending on the strength of the UV source it might take up to
>> 24 hours exposure
>> ------------------------------------------------------
>
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