[rollei_list] Re: OT 24" Aero Ektar.

I've just realized that I have a 24" Aero Ektar.
I bought three lenses at Stellafanne for (an event for amateur telescope builders) in 2007 for about $20. Two of these were boxed, and one of the lenses was mounted in a Fairchild lens-cone. I only just got around to looking at the one in the lens cone, and discovered that it is am Aero Ektar.  I have the 7" version of this lens, which is a very pale tea color and which when I first bought it gave some quite respectable readings from my (now defunct) Geiger counter.
The 24" model is less well known to me and Google is not giving me much.

One site I did find, built by a guy called Micheal Briggs, who is a gamma ray physicist,  seems reasonably authoritative, and contains the following text:
"I own a 7" f2.5, a 12" f2.5 and a 24" f6.0 Aero-Ektar. The 7" (178 mm) f2.5 model is by far the most common. The 24" f6.0 has a different optical design from the others and the documents I have provide little information about it. The remainder of this web page focuses on the faster optics; however, measurements show the 24" f6.0 to be radioactive in a similar manner to the faster optics."

Dr Briggs's site is inactive and e-mailing him results in a returned mail indicating that the mailbox has been unused for some considerable time, hence Earthlink are returning the e-mail.

Does anyone on this list have any further info on the 24" Aero Ektar?

All the best
Larry cuffe