x404.co.uk
http://x404.co.uk/forum/

Radioactive lenses?
http://x404.co.uk/forum/viewtopic.php?f=17&t=18878		 Page 1 of 1
Author:  TheFrenchun [ Sun May 05, 2013 4:29 pm ]
Post subject:  Radioactive lenses?
see info here for pre 70's lenses. No Nikon on there :D

Pre 70s radioactive lenses
Author:  timark_uk [ Mon May 06, 2013 12:02 pm ]
Post subject:  Re: Radioactive lenses?
TheFrenchun wrote:
No Nikon on there :D
Erm ...
Quote:
Nikkor 35mm f/1.4 (early variant with thorium glass elements)
(8+p

Mark
Author:  TheFrenchun [ Thu May 09, 2013 1:36 pm ]
Post subject:  Re: Radioactive lenses?
timark_uk wrote:
TheFrenchun wrote:
No Nikon on there :D
Erm ...
Quote:
Nikkor 35mm f/1.4 (early variant with thorium glass elements)
(8+p

Mark

O cripes that's one I've got!
Author:  timark_uk [ Thu May 09, 2013 2:10 pm ]
Post subject:  Re: Radioactive lenses?
With the thorium glass element?

Mark
Author:  TheFrenchun [ Thu May 09, 2013 2:39 pm ]
Post subject:  Re: Radioactive lenses?
timark_uk wrote:
With the thorium glass element?

Mark

Not sure, mine is from ~1972 I think.
Author:  timark_uk [ Thu May 09, 2013 2:46 pm ]
Post subject:  Re: Radioactive lenses?
Then you'll need to get it checked before you go making decisions about it. (8+)

Mark
Author:  JJW009 [ Thu May 09, 2013 4:44 pm ]
Post subject:  Re: Radioactive lenses?
The way Curie detected radiation was by holding radium very close to her eye in a dim room. When the alpha particles hit your retina, you see a little flash or "scintillation".

Then she died of cancer.
Author:  belchingmatt [ Thu May 09, 2013 7:48 pm ]
Post subject:  Re: Radioactive lenses?
JJW009 wrote:
The way Curie detected radiation was by holding radium very close to her eye in a dim room. When the alpha particles hit your retina, you see a little flash or "scintillation".

Then she died of cancer.


Alpha particles wouldn't penetrate past the cornea. They only really become a problem when ingested, such as that Russian bloke and the Polonium 210.
Author:  JJW009 [ Thu May 09, 2013 8:52 pm ]
Post subject:  Re: Radioactive lenses?
belchingmatt wrote:
JJW009 wrote:
The way Curie detected radiation was by holding radium very close to her eye in a dim room. When the alpha particles hit your retina, you see a little flash or "scintillation".

Then she died of cancer.


Alpha particles wouldn't penetrate past the cornea. They only really become a problem when ingested, such as that Russian bloke and the Polonium 210.

Yeah I was thinking that as I typed it, but didn't want the facts to get in the way...
Author:  ProfessorF [ Thu May 09, 2013 9:10 pm ]
Post subject:  Re: Radioactive lenses?
In fairness, you're not wrong. Just a truncated version of her life. :lol:
Page 1 of 1 All times are UTC
Powered by phpBB® Forum Software © phpBB Group
https://www.phpbb.com/