Fuji Fujinon 55mm f2.2 Lens Radioactive

[pimpy1]

I did not know that some of the Fujinon 55mm f2.2 Lenses are Radioactive. Has anyone tested the optical quality differences in the three different versions?
Video showing that the slightly newer version has Thorium. https://youtu.be/0AyXktR5qWI

[Alun Thomas]

I have an X-Fujinon FAX mount version serial number 305453. As part of my effort to make a list of all my various photographic items I have done radiation testing for a large number of them now. My test results were 0.17uSV/hr at the front lens and 0.16uSV/hr at the rear lens. Those readings are almost indistinguishable from background readings taken with that instrument in my location, so I would say the likelihood of that particular lens having radioactive elements is very low.

As a comparison, a 7 element copy of the Super Takumar 50mm F/1.4 lens measured 0.72uSV/hr at the front element and 1.78uSV/hr at the rear using my particular tester, roughly 10 times higher.

edit: From the video, it's an M42 'newer' version that is quite radioactive. It does seem odd for Fujinon to use a different optical design for the middle version of their entry grade kit lens, and then either redesign it again, or return to the original design, especially when radioactive glass types would traditionally have been more expensive and normally only used on the top lenses offered. But something definitely happened.

[pimpy1]

His version of the newer m42 mount showed around 35 microsieverts/h which is pretty high. I have one in the original 200,000 serial number range that shows no radiation.

[calvin83]

It seems i should get the new version.

[Pancolart]

[pimpy1]

I bought one of the newer m42 versions off of ebay. Going to test one out for myself.

[BrianSVP]

[RokkorDoctor]

Personally I would be more worried about the ever-increasing background levels on non-ionising RF and microwave radiation everyone is exposed to these days.

Not known to cause cancer but I would like to see more research done on how it interacts with the human biochemistry and immune system, especially re. problems like triggering autoimmune conditions such as eczema and psoriasis etc.

[Phalbert]

Probably just stored in Fukushima vicinity.[/quote]
🤭😜🙊

[alex_d]

fujinon 55 2.2 lens is famous its radiation and its harming radiation effect to the people.
lens was sold in huge numbers in Asia due to its affordable price and decent quality.
Many photographers in Asia saw it as a great value for money, making it an extremely popular choice.
A lot of females who were in contact with lens and later gave birth, had to cope with the phenomenon of 'siamese twins' syndrome.

[visualopsins]

[caspert79]

[RokkorDoctor]

[alex_d]

for the one who didnt know: fuji was japanese secret service thing, and 'fujifilm' was just outside cover of that intel.
but the cover got better than the main thing (book).
and yes they did a lot of bad .. baaaadd... veeeryy baaaddd .. things

[D1N0]

Have you been chatting with GTP again?

[alex_d]

@d1no well, one more proof that GPT is a fools gold: here is a yashica J series RF sold as a Fuji(ca) RF

[pimpy1]

This thread turned ever so slightly off topic.

[55]

[RokkorDoctor]

Slightly OT, but I am surprised at the number of people who have, or imply they have, a geiger counter at home.

Did I overlook some major event that made so many go out and buy one?

I mean, as far as I understand it they are not cheap devices that you buy and just put in the back of a cupboard until one day you have a need for it; I thought they need regular recalibration to make low readings meaningful...

[Lloydy]

[RokkorDoctor]

[calvin83]

I would like to have one that is insensitive to beta but sensitive to gamma and X ray only.

[alex_d]

[calvin83]

[alex_d]