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guardian
Joined: 18 Mar 2009
Posts: 1746
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 Posted: Thu Oct 30, 2014 1:40 pm Post subject: Konica Hexanon 57mm f1.2 radiates quality |
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guardian wrote:
I stumbled upon an interesting video of this lens. The video is about three minutes long:
http://www.youtube.com/watch?v=ouLbDd3YOTA |
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Langstrum
Joined: 16 Feb 2014
Posts: 351
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| Posted: Thu Oct 30, 2014 2:23 pm Post subject: |
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Langstrum wrote:
I watched this video last week when I was finding information of this lens. The radiation of this lens, even though it's still within the safe level, but it's so high compared to the others, almost reaches the limit. Is it Lanthanum?
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doomed-forever
Joined: 09 Aug 2014
Posts: 239
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| Posted: Thu Oct 30, 2014 2:23 pm Post subject: |
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doomed-forever wrote:
Quite Boring, as most of us know, way old lenses does have a very slight amount of radiation, because of use from radio active thorium inside the glas elements. That is especially with some old Asashi Pentax Takumar & Super Takumar primes, for instance. But mostly all brands of the time period 60s to 70s had a few "radioactlve" lenses. |
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LucisPictor
Joined: 26 Feb 2007
Posts: 17633
Location: Oberhessen, Germany / Maidstone ('95-'96)
Expire: 2013-12-03
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| Posted: Thu Oct 30, 2014 3:27 pm Post subject: |
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LucisPictor wrote:
Yes, but so far I have always thought that those lenses would emit weak alpha radiation. As I as understand the video correctly, they have discovered gamma radiation, which would be considerably dangerous.
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doomed-forever
Joined: 09 Aug 2014
Posts: 239
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| Posted: Thu Oct 30, 2014 3:50 pm Post subject: |
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doomed-forever wrote:
For instance, not much more than a typical x-ray, what the lens dispenses in about an hour, the radiation levels...but sure, gamma rays are no good for the human body. As for "radioactive" lenses, check out this site:
http://camerapedia.wikia.com/wiki/Radioactive_lenses |
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guardian
Joined: 18 Mar 2009
Posts: 1746
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| Posted: Thu Oct 30, 2014 4:28 pm Post subject: |
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guardian wrote:
| LucisPictor wrote: |
| Yes, but so far I have always thought that those lenses would emit weak alpha radiation. As I as understand the video correctly, they have discovered gamma radiation, which would be considerably dangerous. |
Naaa, it's all good . . . or mostly good.
You're right about the alpha stuff. It's harmless unless you swallow some.
Gamma radiation from some of our lenses has long been known to exist. It's not a recent revelation. There are other threads here on this forum which discuss the gamma stuff, so that's old news. What made the video work for me was actually seeing the radiation register on the detector. That's more impactful than just writing about it. Clicks speak louder than words.
The gamma radiation from lenses is mostly not a danger as a practical matter. Don't sleep with your lens under your pillow and you'll be just fine!  |
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ZoneV
Joined: 09 Nov 2009
Posts: 1632
Location: Germany
Expire: 2011-12-02
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| Posted: Thu Oct 30, 2014 6:42 pm Post subject: |
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ZoneV wrote:
| LucisPictor wrote: |
| Yes, but so far I have always thought that those lenses would emit weak alpha radiation. As I as understand the video correctly, they have discovered gamma radiation, which would be considerably dangerous. |
Not really new news:
http://home.earthlink.net/~michaelbriggs/aeroektar/aeroektar.html
https://www.flickr.com/groups/aeroektar/discuss/72157632176737005/
http://www.orau.org/ptp/collection/consumer%20products/cameralens.htm
http://www.digicamclub.de/showthread.php?t=12322&page=21&p=198476&viewfull=1#post198476
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Attila
Joined: 24 Feb 2007
Posts: 57865
Location: Hungary
Expire: 2025-11-18
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| Posted: Fri Oct 31, 2014 12:49 am Post subject: |
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Attila wrote:
| doomed-forever wrote: |
| Quite Boring, as most of us know, way old lenses does have a very slight amount of radiation, because of use from radio active thorium inside the glas elements. That is especially with some old Asashi Pentax Takumar & Super Takumar primes, for instance. But mostly all brands of the time period 60s to 70s had a few "radioactlve" lenses. |
+1
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RnR
Joined: 11 Jul 2012
Posts: 283
Location: Brisbane, Australia
Expire: 2019-08-29
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| Posted: Fri Oct 31, 2014 2:04 am Post subject: |
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RnR wrote:
Using my copy to radiate an ant colony. Hoping one day to get giant glowing ants I can ride to work so I can sell the car. May need some guidance in taming giant ants. PM me with books, guides and possible strategies.
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Cheers, Hasse |
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