I noticed that the lap in the video is not beveled around the edge. So the top surface of the lap is the same size as the mirror. I wonder if that helps the...
Go to: http://www.loptics. com/ATM/ The are are links on figuring (parabolizing strokes) and oblate spheroids as well as a lot of good information. Note that...
Thanks Mark, I'll have a squiz... Christo ... From: Mark Whitaker To: atm_free@yahoogroups.com Sent: Monday, November 02, 2009 10:44 PM Subject: Re: [atm_free]...
Hey MArk, Thanks for the advice. Since you are the man with the knowledge can you tell me why the SCT has a corrector plate? From what you've told me there is...
Hey Guys, I was wondering, I am looking at the secondary mirror for my cassegrain that I'm making. For an 8" secondary mirror (hyperbolic) the size should be...
At f:8 (rounded) you shouldn't need to alter the lap to with stars or trimming spedial shapes into the channel pattern. I suggest that you not press stars into...
Hey! There is another youtube video there. http://www.youtube.com/profile?user=curiosis#p/u/0/iqdaM-yWrtQ You would have to know when to use this one....
It is a matter of design. Classical cassegrains do not need corrector plates while in the case of the SCT design, it is essential. Most commercial SCT's are...
Mark I enjoy reading your posts. You remind me of my Australian High School Physics Teacher Father John Burns. There is humour at the end of your post too. Ali...
He does sound like my high school physics teaher as well, Brother Leahey. But like my former teacher his advice is for you to decern and accept or prove...
Mark, I admire your spirit. You can indeed actually make a Classical cassegrain, SCT or Ritchey-Chretien. Other amateurs have done it. It's a great challenge...
The warning is basically the same that Texereau puts forth. When you read it, it almost seems to dissuade the amateur from building the cassegrain. It is a...
Good points. Is Texereau still alive. He would be 90. He was a world class professional telescope maker. IMHO, his book "How to Make a Telescope" is required...
Hey guys, I am taking the advice of Mark and just got a copy of How to Build a Telescope by jean Texereau. I've also ordered Telescope Optics. Now I would like...
Mark, I am taking the advice of Mark and just got a copy of How to Build a ... I would add Star Testing Astronomical Telescopes by Harold Suiter. It's more...
Mark, if you are at all interested in the beginning of Amateur Telescope Making, I would recommend the original "Amateur Telescope Making", "Amateur Telescope...
Nice setup! Mark ________________________________ From: unievaspravda <leandrot@...> To: atm_free@yahoogroups.com Sent: Sun, November 8, 2009 6:22:05...
assuming the spec's you list below, I do not see any advantage to go with the giant focuser, any eyepiece that has a focal length that is shorter than 35 MM...
Leandro, Excellent! Congratulations. It is relatively compact for the size of the mirror. How long did it take? How did you bend the ring with precision? Al...
Joe, Do you mean longer than 35mm? Anyway, he most likely wants to maximize his field of view. Throwing away some light is not a problem. However, what does...
YEAH , I noticed that after posting LONG than 35 mm. and yes my 6" f-6 at night is fine but horrible in the daytime because my pupil gets too small and theb...
thankyou friends! I did the bending in some sort of 'tube bending company' :-) that was the best I could find. I enjoyed the results. From the very start this...
I've read and re-read "How to Make a Telescope" many times. As far as I am concerned, there is not a wasted word in the sections regarding making the basic...
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