Hi All Just started a nights observing with my 20". I have had an Argo Navis for a while now but the weather has not been kind. WOW! Much better than the old...
5663
eyegasmic <mva@......
eyegasmic
Mar 1, 2003 12:37 pm
Hey Andrew, Try the Argo Navis User Group on Yahoo, they may have the information you're looking for. I believe Obsession (optionally) installs both the Argo...
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Jim Nadeau <jim@.....
jim_nadeau_101
Mar 1, 2003 2:19 pm
... ServoCat for my scope. I am in the process of installing it, but first I had to return my scope from its Dob Driver configuration to its prior condition,...
5665
Jim Nadeau <jim@.....
jim_nadeau_101
Mar 1, 2003 2:23 pm
... The drivers for the Argo Navis to run the Servocat were just released this week. I imagine it will work well. Jim...
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CraigMolstad <crai...
CraigMolstad
Mar 1, 2003 5:38 pm
Spray pure acetone on the mirror with a squirt bottle. Tip mirror and acetone runs off. Wait. Place back in telescope....
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steve_koehler <ste...
steve_koehler
Mar 1, 2003 6:33 pm
I have some questions about the things I was seeing in a star test last night. I have an 18" Obsession with a new Torus mirror. You can see the specs and...
5668
Frank Bov
frankbov
Mar 1, 2003 7:50 pm
Mirror size A 50% increase in area is about the threshold of "seeing" a difference. I could see a difference from my 10" when I built a 12", but it wasn't...
5669
Attilla Danko
attilladanko
Mar 2, 2003 2:18 am
... An easy way to do that is to deliberately disturb the air around your mirror, by turning a fan on and off, while you observe an out of focus star in the ...
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John Bambury <john...
ausastronomer
Mar 2, 2003 11:41 am
RULE 1: Dont touch the mirror unless its filthy, the mirror can get reasonably dusty without degrading your images too much, unless its really bad you're...
5671
dpertini <rick333@...
dpertini
Mar 2, 2003 9:41 pm
For you real big Dob makers, Surplus Shed is selling 7 inch secondary mirrors for $150 http://www.surplusshed.com/new.html...
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dpertini <rick333@...
dpertini
Mar 2, 2003 9:45 pm
Take a look at the star testing links on this site: http://www.geocities.com/telescope1999/14-5inch.html The guy also posts some very good weather links that...
5673
jcmulherin
jamesmulherin
Mar 2, 2003 10:56 pm
Steve: I looked into your question about turbulence and star testing. First of all, I'm no star testing expert. The following is based on what I read in...
5674
jcmulherin
jamesmulherin
Mar 2, 2003 11:06 pm
Steve: One more thing: "Optical Shop Testing" says the following about the sensitivity of the star test in detecting spherical aberration: "In a study of...
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John Bambury <john...
ausastronomer
Mar 3, 2003 2:20 am
You definately shoudn't have to go with a Secondary that Big, unless something is a bit odd with the design of the telescope. The smaller you can get the...
5676
Neal Galt
nealgalt
Mar 3, 2003 4:31 am
One subject I haven't seen banged about on this site is the idea of masking the outer edges of the primary mirror. According to some people (very in the know)...
5677
John Bambury <john...
ausastronomer
Mar 3, 2003 4:48 am
Someone posted this link the other day, regarding how the guy constructed his focuser mounting box from formica, but he also explains on this page how he...
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Neal Galt
nealgalt
Mar 3, 2003 5:25 am
Thanks John....but, posted what link? Did you mean to include it? Neal ... [Non-text portions of this message have been removed]...
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John Bambury <john...
ausastronomer
Mar 3, 2003 6:06 am
Sorry Neal, I cut the link then forgot to paste it in. You need to go down at least 1/2 way before he talks about testing and masking the mirror, so its...
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Neal Galt
nealgalt
Mar 3, 2003 1:11 pm
John...did you still forget to paste it in? Neal ... [Non-text portions of this message have been removed]...
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Stephen C. Koehler
steve_koehler
Mar 3, 2003 4:01 pm
Attilla, ... Thanks for the suggestion. I will give your idea a try. I would still be interested in any verbal descriptions you can give me of how boundary...
5682
szsherm <shneor@.....
szsherm
Mar 3, 2003 6:12 pm
At a Northern California observers gathering on February 22, there was one 14" dob, three 18", one 22", one 25" and one 30". At another such gathering at a...
5683
Bob Bunge
bungerob
Mar 3, 2003 6:23 pm
... At the 1997 Winter Star Party, my 20-inch homebuilt was the only 20-incher at the party that did not have some sort of DSC. Out east, I see very few 16 or...
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Attilla Danko
attilladanko
Mar 3, 2003 6:50 pm
... Ok how about this: Out of focus appearance of a star tube currents: - slow - sharp edges - swirls and rotates - seems to know your scope is round. -...
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Stephen C. Koehler
steve_koehler
Mar 3, 2003 9:49 pm
Attilla, Thanks very much for the further explanation. ... -- Steve Koehler koehler@......
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Gary Myers <GMYERS...
garyk9rx
Mar 3, 2003 11:19 pm
for those interested in buying or upgrading a DSC we have posted a comparison sheet at: http://rxdesignonline.com/ArgoNavis.html and click on the comparison ...
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Gary Myers <GMYERS...
garyk9rx
Mar 3, 2003 11:20 pm
one more thing - the Argo Navis now has full Sky Commander emulation so it is compatible with both the ServoCAT Tracking and GOTO system as well as the...
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John Bambury <john...
ausastronomer
Mar 4, 2003 2:24 am
I actually had a lot of problems with the site for some reason Neal, I definately pasted it the last time and I have pasted it below. ...
5689
Bob Bunge
bungerob
Mar 4, 2003 2:38 am
Can't help but to state the apparent: this will depend greatly from mirror to mirror. If the mirror has a good edge, it won't need it, if it has edge problems...
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Neal Galt
nealgalt
Mar 4, 2003 6:11 am
Thanks John....it came through and I've bookmarked it. Clear Skies....Neal ... [Non-text portions of this message have been removed]...
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Neal Galt
nealgalt
Mar 4, 2003 6:18 am
I'm told by those who know a great deal more than I, that the outer edge is almost always the weakest point in the image. They recommend a mask for all large...
