laikarin Posted July 11, 2020 Share Posted July 11, 2020 Hi there, So I recently dug out an FD 55mm 1.2 Non SSC that I bought from a yardsale ages ago and I just had a question about radioactivity? Been asked a lot and tried doing my research into it, am I right in thinking that it's only the SSC aspherical version of the lens that contains thorium? If so how do I tell the difference between the two? Thanks! This is the lens: Link to comment Share on other sites More sharing options...
chuck909 Posted July 11, 2020 Share Posted July 11, 2020 Your life is in danger. It is certain that the radioactivity of that lens is fatal. Send it to me at once as i know how to properly dispose of it. Link to comment Share on other sites More sharing options...
chuck909 Posted July 11, 2020 Share Posted July 11, 2020 (edited) OK, I'll be serious. Being that it's a chrome nose, it is an early version of the standard 1.2. I've never heard that that lens was at all radioactive. Edited July 11, 2020 by chuck909 Link to comment Share on other sites More sharing options...
jim_bielecki1 Posted July 11, 2020 Share Posted July 11, 2020 The aspherical version is marked so on the trim ring. Chuck is right, the aspherical 55mm is radioactive, the non-aspherical is not. Link to comment Share on other sites More sharing options...
laikarin Posted July 11, 2020 Author Share Posted July 11, 2020 that's good to know, thanks lads! Link to comment Share on other sites More sharing options...
SCL Posted July 11, 2020 Share Posted July 11, 2020 You could double check by placing it near the probe of a geiger counter! Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now