the radioactive component ( Thorium) is in the glass, not the coating.
Frank Filippone
-----Original Message-----
From: Bill Abbott 3 <captbilly3@xxxxxxxxx>
To: http://lrflex.furnfeather.ca ;<leicareflex@xxxxxxxxxxxxx>
Sent: Sun, Dec 30, 2018 2:07 pm
Subject: [LRflex] Re: An old lens with radioactive coating
Xavier,
I’ve never heard of radioactive lens coatings and I don’t think I would ever
want a radioactive lens.
I remember numbers that glowed in the dark on watches and clocks many year ago.
They used a radium paint, which was banned in the U.S. some years ago as too
dangerous.
Many of the ladies who painted the radium paint on the dials suffered mouth
cancers because they wet the tips of the brushes they used on their tongues.
Thanks for the warning.
Best regards,
Bill
On Dec 30, 2018, at 7:55 AM, 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
Maisons Alfort - France
