Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
04-29-2012, 08:33 PM   #1
Inactive Account




Join Date: Apr 2012
Posts: 1
Takumar Radiation Anxiety

First post, and why I made an account. I just ordered a 50mm 1.4 smc super takumar and have had anxiety ever since. I've been researching for hours and I basically see 95% it's ok, it won't harm you, 5% it will harm you. So, what should I do/think? Is it harmless? How long should I use it for at a time? Can I not look directly into the lens (when not mounted)? should I keep it in a safe when not it use?

Ugh this is freaking me out. Please help me guys

04-29-2012, 08:37 PM - 2 Likes   #2
Veteran Member
selar's Avatar

Join Date: Jul 2007
Location: Sydney, Australia
Photos: Gallery | Albums
Posts: 2,035
I've had that lens for about a year now. Strange things are happening in the house. There are spiders everywhere with their webs and they are freaking me out. They are much larger as well, as are the moths, the ants and the mosquitoes. Strange noises from the attic are keeping me awake at night. I am going to sell it.
04-29-2012, 08:43 PM   #3
Loyal Site Supporter
SteveM's Avatar

Join Date: Jan 2009
Location: Vancouver Island, BC, Canada
Photos: Gallery
Posts: 3,295
Here is a thread on the issue...

https://www.pentaxforums.com/forums/pentax-film-slr-discussion/137774-how-rad...-takumars.html

"Sleeping with such a lens nestled against your body will expose you to less radiation that will eating a banana. "
04-29-2012, 08:50 PM   #4
Veteran Member
selar's Avatar

Join Date: Jul 2007
Location: Sydney, Australia
Photos: Gallery | Albums
Posts: 2,035
QuoteOriginally posted by SteveM Quote
How radioactive are the Super Takumars?
I knew I shouldn't have tried the spider in the jar experiment from that thread!

04-29-2012, 09:02 PM   #5
Site Supporter
Chaos_Realm's Avatar

Join Date: Feb 2011
Location: Melbourne, Australia
Photos: Gallery | Albums
Posts: 1,251
QuoteOriginally posted by Whatawaytogo Quote
First post, and why I made an account. I just ordered a 50mm 1.4 smc super takumar and have had anxiety ever since. I've been researching for hours and I basically see 95% it's ok, it won't harm you, 5% it will harm you. So, what should I do/think? Is it harmless? How long should I use it for at a time? Can I not look directly into the lens (when not mounted)? should I keep it in a safe when not it use?

Ugh this is freaking me out. Please help me guys
Don't Believe anything that the others say! This is radio active and and that is probably why the previous owner is selling it. What can be done about it? Well I have studied the science of this problem and the only solution is to send it to me as fast as you can. I have acquired all the advanced patent pending equipment necessary to handle such dangerous objects Namely the K-7 with its CMOS (radio) active pixel sensor, capable of capturing at 14.6 MP [Million alpha Particles], 5.2 times every second. :evil:

Just kidding, Its harmless. Alpha particles can barley penetrate a piece of paper.
04-29-2012, 09:10 PM   #6
Loyal Site Supporter
SteveM's Avatar

Join Date: Jan 2009
Location: Vancouver Island, BC, Canada
Photos: Gallery
Posts: 3,295
QuoteOriginally posted by selar Quote
I knew I shouldn't have tried the spider in the jar experiment from that thread!
There is always my thread on the issue....

https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/63093-your-tak...dioactive.html

"I think we have all learned a very valuable lesson here.....don't lick your lens clean...especially after eating a banana while wearing a Timex standing under a wasp nest listening to Barry Manilow."
04-29-2012, 09:12 PM   #7
Loyal Site Supporter




Join Date: Jun 2009
Location: Tumbleweed, Arizona
Photos: Gallery | Albums
Posts: 5,107
Just send it to me as I already glow in the dark from working at a nuclear power facility for 5 years. I know how to handle it safely. I already have the lead lined gloves and apron along with the de-contamination area all set up.....

04-29-2012, 09:48 PM   #8
Site Supporter
jatrax's Avatar

Join Date: May 2010
Location: Oregon
Photos: Gallery | Albums
Posts: 10,770
QuoteOriginally posted by Whatawaytogo Quote
Ugh this is freaking me out. Please help me guys
Well, assuming you are not pulling our leg(s)....

Seriously you get more radiation exposure on a day at the beach, or on an airplane flight. I have read that the radiation from a thoriated lens cannot be detected above background levels at a distance of 3 feet. If it is going to freak you out that you won't enjoy the lens then sell it on. But the radiation danger is less than from all the other dangerous things you live with every day: cell phones, microwaves, cell towers, radon gas, computer crts, television screens, living in a house made of masonry, burning coal for heat or power..........

04-29-2012, 09:54 PM   #9
Veteran Member
selar's Avatar

Join Date: Jul 2007
Location: Sydney, Australia
Photos: Gallery | Albums
Posts: 2,035
Don't believe these people, they haven't been through what I have with this lens. Eeeek, there goes another giant spider.
04-29-2012, 10:53 PM   #10
Inactive Account




Join Date: Dec 2008
Location: North Carolina
Photos: Albums
Posts: 1,720
If it was giving off any significant radiation it would ruin film. They didn't stop making them because they were dangerous, they stopped because they were expensive to make.

Worst side effect you'll ever see from the thorium in this lens is the yellowing of the glass in the lens, which is easily resolved with a good dose of UV light.
04-30-2012, 02:30 PM   #11
Veteran Member
kcobain1992's Avatar

Join Date: Dec 2010
Location: Bucharest, Romania
Photos: Gallery
Posts: 1,409
I don't know about the health effects of the lens, but it surely is addictive. Once you receive it, you will find out that everything about it is to die for.
04-30-2012, 02:41 PM   #12
Junior Member
maxk7dish's Avatar

Join Date: Jun 2011
Location: Boulder
Photos: Gallery
Posts: 26
Should I be worried?

The Takumar I'm about to purchase seems heavily dosed. Should I be worried about using my dog as a monopod with this lens? Normally I steady my shots with the aid of my furry friend and the device I built specially to attach my setup to him, but now it looks like he might get radiated. As dogs might be more prone to radiation sickness, I'm curious whether you all think this is a good decision. (I'm thinking "buy the Takumar")
04-30-2012, 03:40 PM   #13
Senior Member




Join Date: Mar 2011
Posts: 119
Introduction of Thorium Oxide into Super Takumar Lenses
http://homepage1.nifty.com/nekocame/camera/atomlens.htm

According to the second link, you could expect ~ 1uSv per hour of exposure. According to the following chart, you expect to get around 10 uSv per day anyway, so the extra exposure is unlikely to cause problems.





http://xkcd.com/radiation/

Last edited by alphanerd; 04-30-2012 at 03:41 PM. Reason: Adding link
04-30-2012, 05:49 PM   #14
Pentaxian




Join Date: May 2010
Photos: Albums
Posts: 652
Check this out then find it out from the above chart.

04-30-2012, 06:12 PM   #15
Pentaxian
panoguy's Avatar

Join Date: Sep 2007
Location: Washington, D.C.
Photos: Gallery | Albums
Posts: 3,290
QuoteOriginally posted by ultraviolet Quote
Check this out then find it out from the above chart
Oh, now I need to get one of those lenses! I'll store it next to my wife's synchrotron dosimeter and she might get an extra day off each year!
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
anxiety, harm, k-mount, pentax lens, slr lens, takumar, takumar radiation
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale - Sold: K20D w/Katz Eye, SMC Takumar 135/2.5 (Ver 2), Super Takumar 105/2.8 kenafein Sold Items 16 04-02-2012 11:41 AM
BBC: Probe finds high radiation in damaged Fukushima reactor jolepp General Talk 9 04-01-2012 09:25 AM
Anxiety before switching (back) to Pentax intjonmiller Flashes, Lighting, and Studio 29 10-23-2011 12:14 PM
Research on Electromagnetic Radiation from Digital Cameras? conordoherty Photographic Technique 8 06-02-2011 10:41 PM
For Sale - Sold: Takumar: Super Takumar 135mm f3.5 includes case, hood and caps Peter Zack Sold Items 7 05-17-2010 07:12 PM



All times are GMT -7. The time now is 07:27 AM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top