Mike, I would second that. Would definitely be interested in if another forum member had AP equipment that they would like to sell. For instance, if anyone out there had a 206EDF they would like to pa

Wow, what a find! From: <main@ap-ug.groups.io> on behalf of "Kurt Johnston via groups.io" <JohnstonKK@...> Reply-To: "main@ap-ug.groups.io" <main@ap-ug.groups.io> Date: Saturday, March 2

Congratulations!

I have the brass plate on my 155EDT case if that helps narrow it down at all.

Jeff and all, thanks for the feedback. More than happy to help. Glad S&T was agreeable to dissemination of the work in this forum. Now if only there were a coffee table style book featuring the wonder

It’s amazing how useful a Christen triplet from that era remains as compared other contemporary technological innovations such as the rotary dial telephone. Some things really do stand the test of tim

At long last, Sky & Telescope has granted permission for this article to be posted to the Astro-Physics user group. Permission is limited to this user group only. This copy of the article should not b

I had a project for five years that routinely took me down to New Zealand. Had only six days total for round trip travel and on site work for each trip. Two connections just to get to the west coast b

Perfect, thank you!

Checking back in on the question below concerning spacing for the 155EDF. Is 86.5mm the recommended distance for this scope with the quad TCC? Am working on setting up a dual AP 155EDF imaging setup a

Congrats Ross. Have been through both doses of the Pfizer vaccine. Life is still the same in terms of social distancing and general safety measures, but there’s definitely a sense of more ease knowing

Congratulations!!

Is there a “notify me” waitlist I can sign up for to be notified when the Astro-Physics goodie bags are available for order? From: <main@ap-ug.groups.io> on behalf of "Roland Christen via groups.io" <

A counterweight in a goodie bag balancing 160 and 155 EDFs may be one of the best things I’ve seen all week. From: <main@ap-ug.groups.io> on behalf of "Roland Christen via groups.io" <chris1011=aol.co

Alex, sounds like there was definitely power in numbers with this. Glad you were advocating as well. Here’s the link on the web site. It is listed as backordered, but I believe there are more in the w

Stuart, that’s correct, though technically the Optical Structures Incorporated (OSI) parent company (which owns farpointastro as well) owns Astrodon now. OSI also acquired JMI and their associated pro

That’s great, thank you for the additional information. From: <main@ap-ug.groups.io> on behalf of "Roland Christen via groups.io" <chris1011@...> Reply-To: "main@ap-ug.groups.io" <main@a

Roland, apologies for the basic question, but would it be possible to provide additional info on the PgF value? I understand the principles behind the Abbe number (Vd) and how that relates to differen

Spectacular, thanks for sharing this image. From: <main@ap-ug.groups.io> on behalf of Brian Valente <bvalente@...> Reply-To: "main@ap-ug.groups.io" <main@ap-ug.groups.io> Date: Friday, January 8

Jim, if you are currently seeing patients, you are eligible to receive it now. It is a matter of finding a local hospital or vaccine provider currently providing administrations. Here’s an excerpt fro