And Thorium is an alpha emitter, so I would guess the chips are pretty
well protected as a few sheets of paper will block most alpha
particles. The chips are embedded somewhere deeper in the camera body
where they can probably hide from alpha particles.
Aram
On 12/30/2018 9:19 AM, Frank Filippone wrote:
the effects of radioactivity on integrated circuits is a known issue. However it is a VERY long term effect. I would think the memory chips would be affected first. Fixed logic chips would be the most stable.
Another thing to worry about for DIgital Cameras.
Frank Filippone
-----Original Message-----
From: Richard Palmer <dmarc-noreply@xxxxxxxxxxxxx>
To: leicareflex <leicareflex@xxxxxxxxxxxxx>
Sent: Sun, Dec 30, 2018 6:44 am
Subject: [LRflex] Re: An old lens with radioactive coating
I remember seeing in an old issue of the LHSA publication, Viewfinder, the results on transparency film of a Summicron with Thorium glass. The color cast was very warm. Also, in Shutterbug magazine, I believe in a Roger Hicks article on a Thorium Takumar lens, he placed the lens for a period of time on Polaroid film. It made a circular fog mark on it. I thought the You Tube video to be a little "scary" when the clicking noises
started. I think you may be wondering about the radioactivity interrupting any signal functions in a digital camera?. Interesting post.
Best.
Rich Palmer
On Sunday, December 30, 2018, 10:55:24 AM EST, Bille Xavier F. <hot_billexf@xxxxxxxxxxx> wrote:
good Day Flexers.
We sometimes remember the good ol' time.
Well, by today standard, it may show we had less expectation.
Here; the effect of an old Takumar lens with a radioactive coating on a quartz Watch:
https://youtu.be/VQJouNzC_7k
Now what happens to a sensor a digital camera if such a lens is mounted? hmmmm
Just out of interest. Enjoy...
#-----------------------------------
From : Xavier F. BILLE
mail : hot_billexf@xxxxxxxxxxx <mailto:hot_billexf@xxxxxxxxxxx>
Maisons Alfort - France
