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07-05-2013, 02:34 PM   #1
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SMC Takumar 105mm f2.4 radioactivity

Hello all,

are all the standart 105mm Takumars for 6x7 radioactive? In this post on Camerapedia there is listed only the Super Takumar 105mm (the first version of this lens). I have the SMC Takumar and my lens serial number is 8514138, so I assume it is a later one (maybe I'm wrong).

I ask because I was joking about the lens radioactivity and since then, my mother have forced me to get rid of it. She says she doesn't want something like that in our house. Well I hope you are not rolling on the floor laughing right now.

Thanks!

07-05-2013, 02:37 PM   #2
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QuoteOriginally posted by Martin Snajdr Quote
Well I hope you are not rolling on the floor laughing right now
Bananas are radioactive too Seriously though, unless you hug the lens every day while your sleep, it's not going to hurt anyone or anything.

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07-05-2013, 02:52 PM - 1 Like   #3
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You'll get worse radioactivity from your smoke alarm. And you're supposed to have one on each floor!

Heck - the Sun is radioactive...better keep indoors. Wait - there's that lens and that smoke alarm...
07-05-2013, 03:37 PM   #4
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QuoteOriginally posted by Adam Quote
unless you hug the lens every day while your sleep,
hahahahsdagkzdriv kz!!

07-05-2013, 03:43 PM   #5
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QuoteOriginally posted by Adam Quote
Bananas are radioactive too Seriously though, unless you hug the lens every day while your sleep, it's not going to hurt anyone or anything.
Wait, you mean to tell me that you /don't/, Adam?

(I'll let it slide that apparently you sleep during the /day/ ...)
07-05-2013, 05:02 PM   #6
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I believe it was only the 105 Super-Takumar that used Thorium glass and not the Takumars that followed. Designers wanted to use glass made with high atomic number elements for their high refractive index benefits.
07-05-2013, 05:16 PM   #7
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QuoteOriginally posted by Adam Quote
Bananas are radioactive too
...as are people. The average person has about 350x the radioactivity of the average banana.

Banana equivalent dose - Wikipedia, the free encyclopedia
07-05-2013, 07:14 PM   #8
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So Spider-Man is actually a banana spider that was bitten by a radioactive human?

Wait... what kind of lenses did Peter Parker use?

07-05-2013, 07:43 PM   #9
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Ever had an x-ray? Or MRI? Or a CT scan? Any one of those will deliver much more radiation to you than a Takumar lens ever will. So too, a microwave oven 5 second after stopping. Thorium in lenses is becoming a nauseating serial offender in internet threads. Love the lens for its novelty value rather than the perceived hazard is presents to life.
07-05-2013, 11:37 PM - 1 Like   #10
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QuoteOriginally posted by desertscape Quote
I believe it was only the 105 Super-Takumar that used Thorium glass and not the Takumars that followed. Designers wanted to use glass made with high atomic number elements for their high refractive index benefits.
Thank you for answering my question and not making fun of me !
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