Quote Originally Posted by wayne naughton View Post
ok, now what's the story with these 'yellow' coated smc's... you know, the one's that glow in the dark.....or is that another urban myth....grin
Well, they don't actually glow in the dark but the Super-Takumar 35mm 2.0 and 50mm 1.4 do have radioactive lens elements. I believe it has to do with some of the minerals they used to create the glass in the rear elements in these two lenses.

The lenses will unfortnunatly turn yellow over time, but this is easily cured with strong UV light.