12-09-2016, 11:19 PM
(This post was last modified: 12-09-2016, 11:20 PM by stoppingdown.)
This guy did perform some measurements with a geiger counter - not the Mitakon, but other lenses. It might be useful just to have an idea:
https://mbphotox.wordpress.com/2015/07/2...my-lenses/
The most active lens he measured is a Fujinon. His conclusion:
OTOH, it seems that the radioactive element is always an inner one, so radiation is partially reduced by other glass elements. I'd be a bit worried, though, if I had one of those lenses and I broke it, thus exposing the radioactive element.
https://mbphotox.wordpress.com/2015/07/2...my-lenses/
The most active lens he measured is a Fujinon. His conclusion:
Quote:For comparison, when you fly from New York to Germany you get a dose equivalent of 0,1 mSv. That’s 10 nights of sleeping with the Fujinon under your pillow.
OTOH, it seems that the radioactive element is always an inner one, so radiation is partially reduced by other glass elements. I'd be a bit worried, though, if I had one of those lenses and I broke it, thus exposing the radioactive element.
stoppingdown.net
Sony a6300, Sony a6000, Sony NEX-6, Sony E 10-18mm F4 OSS, Sony Zeiss Vario-Tessar T* E 16-70mm F4 ZA OSS, Sony FE 70-200mm F4 G OSS, Sigma 150-600mm Æ’/5-6.3 DG OS HSM Contemporary, Samyang 12mm Æ’/2, Sigma 30mm F2.8 DN | A, Meyer Gorlitz Trioplan 100mm Æ’/2.8, Samyang 8mm Æ’/3.5 fish-eye II | Zenit Helios 44-2 58mm Æ’/2
Plus some legacy Nikkor lenses.
Sony a6300, Sony a6000, Sony NEX-6, Sony E 10-18mm F4 OSS, Sony Zeiss Vario-Tessar T* E 16-70mm F4 ZA OSS, Sony FE 70-200mm F4 G OSS, Sigma 150-600mm Æ’/5-6.3 DG OS HSM Contemporary, Samyang 12mm Æ’/2, Sigma 30mm F2.8 DN | A, Meyer Gorlitz Trioplan 100mm Æ’/2.8, Samyang 8mm Æ’/3.5 fish-eye II | Zenit Helios 44-2 58mm Æ’/2
Plus some legacy Nikkor lenses.