Back to Home

ATM Forum Message

Forums: Atm · Astrophotography · Blackholes · Blackholes2 · CCD · Celestron · Domes · Education
Eyepieces · Meade · Misc. · God and Science · SETI · Software · UFO · XEphem
RSS Button

Home | Discussion Forums | Amateur Telescope Making | Post
Login

Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place...
The Space and Astronomy Agora
Yes, A Song Indeed...

Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To
Posted by Don Thomas on August 27, 2001 21:14:41 UTC

in fact, it was just sitting in the cabinet of an optical comparator I bought, so it was essentially free. There is a catch of course...and that is, although the top surface appears pristine, it does have a large (2" long x 3/4" x 3/4" est.) break out on the back side at the edge. Others have speculated that this could produce slight geometric changes throughout and therefore alter it's value greatly (like back down to "free" ? :-)) Any thoughts ?

Follow Ups:

Login to Post
Additional Information
Google
 
Web www.astronomy.net
DayNightLine
About Astronomy Net | Advertise on Astronomy Net | Contact & Comments | Privacy Policy
Unless otherwise specified, web site content Copyright 1994-2021 John Huggins All Rights Reserved
Forum posts are Copyright their authors as specified in the heading above the post.
"dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET"
are trademarks of John Huggins