Hi All, My 16" mirror just arrived. But I seem to have misplaced some of my software and links that aided with telescope design. I found Newt 2.5. But there...
Hiya Tim- Not sure if this site is the one you recall but here's what I've got: http://bi-staff.beckman.uiuc.edu/~melockwo/diagonals.html Another useful...
What would be the realistically ideal tolerances or maximum sag as the scope moved from zenith to horizon? - In degrees, or in thousands of an inch at the...
Why a 3 pole? Why not a 4 pole design? I have built a 14" using a 4 pole design. From my experience actually using my telescope and from my calculations,...
What you need to find is how big the "diffraction limited" part of the FOV is, ie, how far off-axis you need to be for the coma effect from miscollimation to...
The collimation limit for 1/4-wave performance is a diameter of 0.0007 f^3 in inches, where f is the focal ratio of the telescope (S&T May '91 Astronomical...
My Dennis Steele (dobstuff) 13.1 f/4.5 is being shipped tomorrow, should have it late next week. It's got a 13.1 Coulter mirror that I had shipped to John...
I seem to remember a table in the back of Kriege/Berry with sag information. My own experience suggests for casual visual observing, other factors, including...
Larry, Try Texas Towers. I've had good luck with them. Pat M. ... I am taking an old 16" mead telescope and building a truss DOB to take its optics. Where is a...
Hi All, I live in Alberta, Canada and need to have a 16" mirror tested (possibly refigured) and then recoated. (The mirror needs to be recoated, so I might as...
Normand Fullum doesnt coat his own mirrors. But he does use a coater in quebec who an do, If I recall correctly 16" mirrors. Normad takes larger mirrors to the...
Great Forum here ! Thanks for the helpful comments John & Bob. Roy, thanks especially for your advice. I just located your earlier involvement some time back...
Thanks, Bob. You should probably also review Robert Houdart's web site on truss deflection compensation -- The truss isn't the only part of the telescope that...
... I use 0.02 inches or 1/2mm. That's to satisfy optical alignment and pointing accuracy requirements. Remember that if you settle on 60 degrees up from...
Thanks for the specifics Mel. Roy, you're right – Robert Houdart's site and his advice have been very useful and instructive for us non- engineering...
In my 18" Truss dob I flocked the upper cage interior with squares that came pre-cut from Protostar. I then took a razor blad and made a few slits down them to...
This is just a brief announcement to say that I have added a couple of new items to my Accessories website for Obsessions and other Big Dobs. The items are a...
I would like someone to share with me the wait times that any of you have experienced waiting for a Webster scope with a Zambuto primary mirror. That is the...
I can no longer find the website for Starstructure telescopes. the starstructuretelescopes.com domain has expired. Anyone know what's happening there? -ad...
... Mike announced some time back that he was no longer making large telescopes. What really is a shame is that he deleted the Starstructure Yahoo group too....
... I can't state the wait time with a Zambuto mirror, but when I called a about a 32" Kennedy mirror, they said 16 months was the current wait time because of...
... Any idea why he quit? The scopes sounded very impressive. And who is Steve Kennedy making mirrors for now, if neither Starstructure or Starmaster is using...
... He really did not have the people skills or patience for dealing with the public. Many of his posts seemed very argumentative. I had emailed him a list...
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