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Is Non ebc Fujinon-W 35mm contain thorium?
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PostPosted: Mon Jun 24, 2024 12:24 pm    Post subject: Is Non ebc Fujinon-W 35mm contain thorium? Reply with quote

Hello I'm gonna buy fujinon-w 35mm lens no ebc.
I can't find any information about this lens contain thorium.
thank you
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PostPosted: Mon Jun 24, 2024 3:15 pm    Post subject: Reply with quote

https://camerapedia.fandom.com/wiki/Radioactive_lenses#Lenses_Tested_Radioactive_(by_contributors_to_this_page)

the 1.9 and 3.5 versions have mild radiation. no data on the 2.8


PostPosted: Mon Jun 24, 2024 4:46 pm    Post subject: Reply with quote

Off topic

That list has a link to video showing two 8-element SUPER-TAKUMARs one radiates, the other does not. Comparing serial numbers at https://takumarguide.weebly.com/1--14--50-358-8-element.html the two lenses are from different batches one with model number 378, the other 37800. The notes are revealing regarding why the radiation differences! May reveal a recalculated 8-element formula. I'll check my copies later today...