Radioactive Takumar ?!?!?

[Ben Loke]

Here the results after scanning with Radiation Alert Inspector device.

1) SMC Takumar 55mm/1.8 = 55µSV/hr
2) SMC A50mm/1.4 = 0.3µSV/hr
3) TAIR 135mm/2.8 = 0.2µSV/hr

All readings taken at rear element.

After putting on the rear cap, the reading for SMC Takumar 55mm/1.8 = 11µSV/hr.
That's much lower than 55µSV/hr as measured w/o the cap.
Once the lens mounted on the cam, will measure soon.

 

[sebianos]

And I do not believed you will be exposing yourself with direct contact to the rear lens element for hours at a time.

Okay... I'll have to stop looking at the rear element and saying to myself "So nice... " :bsmilie:

Orlyandico, I'm thinking that radiation from takumar lenses should be within the safety limit as long as we don't exceed 360 hours of use per year. That's pretty reasonable for an amateur like me. No worries. Pity the professional who uses Taks exclusively. OUCH !!!

BIG THANK YOU to Ben for providing the readings. :cheergal:

 

[Ben Loke]

Okay... I'll have to stop looking at the rear element and saying to myself "So nice... " :bsmilie:

Orlyandico, I'm thinking that radiation from takumar lenses should be within the safety limit as long as we don't exceed 360 hours of use per year. That's pretty reasonable for an amateur like me. No worries. Pity the professional who uses Taks exclusively. OUCH !!!

BIG THANK YOU to Ben for providing the readings. :cheergal:

You're welcome.

I done the last 2 readings when SMC Tak 55mm/1.8 mounted on cam.
1) From camera back = 0.5µSV/hr
2) From behind shutter plane = 1.0µSV/hr

So, I guess better not to inspect the lens from the rear too often.:bsmilie: