Hi Everyone, Sorry, But it has come to my attention that something or someone has been using my email contact list to send advertising links to my friends and...
Hello all whom may be interested, Recently it was brought to my attention that there was a possible issue with the threads on my Astrocrumb FilterSlide...
Hello everybody, The 1100 mm telescope project we commenced in 2007 is taking a second start after nearly 4 years of interruption. See the web page for the...
The Cruxis Mirror Edge Support Calculator shows that two-point mirror edge support performs nearly as well as a 180 degree cable sling, with similar degrees of...
Hey everyone. I have acquired some PTFE strips 1/8" thick x 1" wide x 9 ft long. I can cut these into any length you desire. And if you need 3/4" wide, I...
BigDob group, this spring a 28" f4.1 Starmaster w/Kennedy optics has been installed in a new astro village 30mi south of Silver City, New Mexico. Last night...
Hi, I'm tring to decide on a suprax mirror blank thickness for a 600mm - the maximum size of their moulded blanks, the choice is 45mm or 60mm? I have made two...
For several years I have had a 16 x 1 inch mirror with a fan on the back and small 1 inch fans that blow across the font and so had not noticed the following...
Have a Coulter 13.1 Odessy 1 scope. spoke to a couple of recoaters about the primary mirror and both find that they have recoated many. Has anyone had their...
Has anyone got any photos/links to a large dobsonian mounted classical cassegrain? I have a chance at getting a heavy (125 lb ) OTA and am musing about...
Hi, just joined the group. My name is Geoff. I live in Red River NM and I have a 24" Techtron dob and observe at 9,800ft. I would like to invite anyone who...
Dear All, I have a dob mount that I want to motorize. It previously had a Dob Driver II fitted. The simplest thing would be to fit another, but my e-mails to...
Hoping someone can help me understand how to make good connections for a crushed tube ends to the UTA bottom ring. I want to crush then end of the tube, and...
Hi Everyone,,, I am an aviation guy who cant afford the hobby any more,,, so in search of a new past time,,, I happened upon a 13.1 inch Coulter Oddessy 1. ...
I am wondering if anyone could recommend a place to have a mirrors reground and re-aluminized. Also where to find other parts to put a Newtonian together. bill...
Dear all, have some of you an idea of how many amateur astronomers are out there? For example S&T have about 80000 copies (if I remember well), but of course...
Astro Heads, One August night, high in the Andes; Simon, Bernard, and i bagged 101 Globular Clusters in a dusk to dawn Globular Cluster Marathon! i think...
Hi everybody, I would like to do some prime focus photography of the moon with my 22UC and my Canon EOS550D (Rebel T2i). Unfortunately, I cannot get a focused...
Hello to everybody in this group. Next year I am planning to start building 20" Dob. I have one simple question : Should I go with 2" thick mirror, or 1.8 or...
Hi, I own an Obsession 22UC and I wonder what is the widest FOV I can expect with it without any obstruction, vignetage... Right now, I am using a Nagler 5...
Dear all, A great majority of the large dobsonian scopes (over 24") in France have been made during the last 20 years, using astatic levers for the mirror...
I am trying to made roboscope out of Lightbridge12. For start I need large worm gear and willing to do it myself, but need AL disk about 16-20 inch in OD and...
Dear Bigdob Group, just joined you guys tonight and am curious to see the discussions coming up here. Reason for me to sign up is that I consider myself to be...
Hey Astro Heads, i've just completed a combination observatory/garage at the New Mexico Astronomy Village. You can view images in the Photo section of this ...
