[QUOTE=Jeff Searust;757009]Here is the greatest list of M42 lenses for all the m42 junkies:

http://m42.artlimited.net/site_lenses.php

I too have a couple of the "radioactive lenses" -- here is a good bit of information from Oak Ridge about that.

/QUOTE]

i just knew sooner or later someoneone would come up with a list as long as your arm, thankyou very much....grin

so these thoriated lenses are more oneoffs or oddities rather than a complete range or series?