Canon Rangefinder 35mm f1.5 Wide Angle Lens is Highly Radioactive

M. Valdemar

Top Veteran
New York City
I was testing some of my vintage Rolex dials for radioactivity with a dosimeter.

Out of curiosity, I pulled out some of my rangefinder lenses and tested them. I had one collapsible 50mm Summicron that I was almost positive was radioactive but it was not. So then I tried the 35mm f1.5 Canon and the dosimeter went haywire.

SUPER high radiation.

It's curious, because I never see that lens mentioned as having radioactive elements. I wonder if my is a fluke or maybe it is not just common knowledge.

Can anyone shed any light? A Google search does not reveal much.

William Lewis

Hayward WI
Real Name
William Lewis
I'd wonder if it was used by the military or a photojournalist at one of the nuclear test sites? Getting dosed that way might still leave residual radiation while not having the thorium glass.
Top Bottom