Of all the reading I have done, I have come to understand that for every 10 inches of focal lenght the magnification is muliplied. A 10" F-6 mirror would...
For a photograph, the magnification is the focal length of the scope divided by the distance from your eye to the photograph. . . . Richard ... From: Paul Lane...
With all the talk about America's new world odor and the metric system, it is nice to know that our Russian friends are doing a good job. I use baltic birch...
Greetings: Well, tonight I tackled my 8" f/6 mirror in two figuring sessions, with good results. Two Tex test sheets are pasted below. Also, I posted more...
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the atm_free group. File : /6"f6...
atm_free@yahoogroups....
Oct 2, 2002 11:56 am
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BlankHi I posted my a file on the site of the first pic of my mirror after 1 hour of polishing to check if it's a sphere Comments welcome Pieter PS. I did...
Hello Pieter, ... hour of polishing to check if it's a sphere You did not say whether the pic was taken inside or outside ROC. Let me assume it was inside...
Greetings (yawn): I'm still chewing on the results of last night's figuring sessions. I learned a couple of things from it: 1) The Foucault graphs that Tex...
... Well its looking better. What is happening is you have reduced correction on the outer two zones. That will give you the room to increase correction from...
Jerald: Thanks for your response. A couple of follow-up questions, to make sure I understand: ... across zone 2. Doing that makes zone 2 COC shorter reducing...
Greetings: I am testing my first mirror (an 8" f/6) with a slitless tester -- moving light source, which is a green LED. While I have ascended the learning...
Since you are making progress and know the strokes to use for you to get the center down a bit... Continue using that to make the center right then tackle the...
... Ok! Just make an adjustment in how you look at those zone measurements. The important thing is to look at the DIFFERENCE from one zone to the next Perfect...
OK, but I'm confused about how you got those difference numbers. Were you using the data from the FIRST Tex data sheet or the second? Because the second one...
Michael Here's something else to consider. The ring lap. If you don't know what it is, it is explained in a file called Ring Lap.eml in the folder titled...
... Well I was using the old #'s. check zone 3 to 4. I have .022 not .032 It looks like now you have got the hole out. The numbers from 2 thru 4 look good...
Thank you. So I am not crazy after all. I was befuddled by what you were saying, but that was because we were talking about different numbers. Whew. I will...
Ok! Glad that is cleared up. It looks like what you did to the mirror worked. I haven't run these numbers out yet to see what you have but I can see that they...
I conducted another series of tests tonight, and came up with the Tex data sheet below. I wish to point out that I am least confident in the measurements for...
Jerald: After sleeping on it, thinking on it and reading your suggestions carefully, ... As I read the numbers (pasted below), the figure is undercorrected...
Ok I ran out your numbers at work and saw what you have. Keep in mind how good you have done so far. I don't have the programs you are using but if they graph...
... Dawg gone I've got to proof read better. That should read MOT with long 3/4" wide W.... as below. Hope you haven't put this to use yet! I think what I...
Everyone, I have received 3 viruses these even from a message RE:Coated plastic lenses. I did not catch the senders name, but the virus is w32.bugbear @ mm ....
Greetings I did a one-trip figuring session tonight, focusing on taking down the undercorrected 1-2 zone. Jerald's suggestion made good sense to me -- focus on...
