Mike Spooner has done the final polishing on the corrector lenses and the scope performs extremely well now. He has removed the last of the astigmatism which has allowed me to star test at 865X and have solid airy disks and good first diffraction rings. I've updated the article on my web site that describes the process of testing and using the scope while trying to remove the astigmatism. You can find it at the following link: http://members.home.net/rmscott/lh_scope/lh_scope_in_use/lh_scope_in_use.html Now that I'm enjoying the final performance results that this design is capable of, I highly recommend the Lurie-Houghton design to anyone willing to tackle this optical configuration. Read and enjoy, Rick Scott rmscott@xxxxxxxx http://members.home.net/rmscott --- This message is from the AZ-Observing mailing list. If you wish to be removed from this list, send E-mail to: AZ-Observing-request@xxxxxxxxxxxxx, with the subject: unsubscribe. The list's archive is at: //www.freelists.org/archives/az-observing This is a discussion list. Please send personal inquiries directly to the message author. In other words, do not use "reply" for personal messages. Thanks.