Author Topic: bleaching radioactive nikkors  (Read 176 times)

richardHaw

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bleaching radioactive nikkors
« on: May 30, 2021, 12:52:32 »
https://richardhaw.com/2021/05/30/repair-bleaching-radiated-lenses/

this is how i bleached my 35/1.4N, i think I will call it "Michael Jackson" from now :o :o :o

Roland Vink

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Re: bleaching radioactive nikkors
« Reply #1 on: May 31, 2021, 00:30:37 »
Oh, that's Bad! :)

richardHaw

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Re: bleaching radioactive nikkors
« Reply #2 on: May 31, 2021, 00:35:09 »
it's his best album, i think ::)

looks like nikon doesnt use thorium that much? :o :o :o

Roland Vink

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Re: bleaching radioactive nikkors
« Reply #3 on: May 31, 2021, 00:51:48 »
I read there are low levels of radioactivity from the AI 200/4 micro and maybe a few others, but not enough to cause any discoloration of the glass.
The Nikkor-N 35/1.4 was the pinnacle of lens development when it was announced - a very fast wide-angle lens, with multicoating, close range correction, and special glass for controlling aberrations. Just a bit too special in this case :o :)
When the K version came out they were able to substitute different glass with similar properties and no radioactivity.

David H. Hartman

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Re: bleaching radioactive nikkors
« Reply #4 on: May 31, 2021, 01:39:15 »
All this work to get rid of what you'd pay $50.00 to $120.00 for a Moose Peterson Warming CPL filter.  :D

Dave
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