Jerry, ... I will respond to this right away. I hope to respond later today to all the other comments people have made. I didn't lose track of the right one,...
So what you are saying is that the image I is more correct when you take the center of the zone (Rsub2 + Rsub1 / 2) than what J is? I've always assumed that...
Google is the starting spot for finding anything on the web. Put in the stuff that you are interested in finding and don't forget that putting words in quotes...
ATM and atm_free, I'm going to make a group response to the many responses I got on the zone one challenge. Thanks for everyone's interest in this. Also,...
... Gawrsh! ... Check out the following. http://www.aim-dtp.net/aim/index.htm My monitor is fairly well calibrated, as I do a lot of photo editing. As for ...
Here's another attempt to make sure everyone sees the odd brightness profile I see in my zone one example. I have posted two more graphs, one for zone 1 and ...
Steve and all: I've been busy for a few days, and so missed the chance to join in the fun. When I took the challenge, my answer was to choose either frame H or...
Hi all, I've just finished rehabbing a 10" dob that would not collimate due to a secondary that was offset at 90° to both the OTA axis and the eyepiece axis. ...
Bruce, ... Have you verified that the peep hole is located at the focal plane? The farther out you place it, the less of the primary you will see. If you...
Hi Bruce, It all depends, if I roll my focuser all the way in and look through a peep hole i can not see all my mirror either,but when I draw the focuser out...
Here are the specs of my scope as loaded into Newt: (copied from the .nwt file) NEWT * 9.8 inch f 5. 9.8 primary mirror diameter 5. f ratio 11.2 tube...
... Bruce, I'm thinking this is wrong, if I remember correctly it is the measurement of the focuser without the tube extended, but then... it should be fine as...
I do believe that Newt measures from the inside of the tube for the focuser height. I'll also note that the focal plane of the typical 25mm is about 3/4" or so...
Well, I checked using a film canister cap. When racked out, I could not see the clips. However, when I racked in as far as I could, I could see them all...
Bruce, I entered your specifications into my spreadsheet. Your secondary is large enough. You will have about 2 mm radius fully illuminated field using this...
Hi, anyone have a plan for a 10" or 12" or 12.5" truss telescope ? the base and the rockerbox and the mirrorbox and the cage and so. Joel -- No virus found in...
oh, and does anyone know a place where to get cheap mirrorkits, now that mirrorkits appears to be gone? -- No virus found in this outgoing message. Checked by...
In a message dated 4//05 10:43:23 AM Eastern Standard Time, frog3@... writes: oh, and does anyone know a place where to get cheap mirrorkits, now that...
Thanks, Jan, After I determined why I wasn't seeing the mirror edge, I was much happier. Which spreadsheet do you use? I looked on your web page, but didn't...
Sure, you can get a blank from me. Would 9" be OK? You can get the grits at ordinary abrasive suppliers or from gotgrits.com. You can get dental stone by...
A number of people asked for or hinted at the desirability of an animated version of the zone one challenge to try to capture some of the qualities of an ...
... That goes along with my experience. Thanks, Steve, for the nice animation. -- Michael Lindner http://www.starastronomy.org *** http://home.att.net/~mikel ...
I think your problem is the mirror clips. They are not tight enough. ... From: Bruce MacDonald [mailto:brumac@...] Sent: Monday, April 04, 2005 11:10 AM...
Interesting thought. When I re-assembled the mirror cell I made certain that the mirror could not move laterally at all in the cell, then I brought the mirror...
Bruce, I use Peters and Pike's formulae to calculate off-axis illumination. I don't have the article here, because I am in France at the moment (wanted to...
Michael, ... Thanks. I got impatient, and posted the manual version of the script before getting real animation working. I have now posted a version of the...
Tichard is being Richard there. You want to be able to slip a business card between the clips and the mirror, even with the rubber between the glass and the...
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