Search the web
Sign In
New User? Sign Up
skyquest-telescopes
? Already a member? Sign in to Yahoo!

Yahoo! Groups Tips

Did you know...
Want your group to be featured on the Yahoo! Groups website? Add a group photo to Flickr.

Best of Y! Groups

   Check them out and nominate your group.
Click here for the latest updates on Groups Message search

Messages

  Messages Help
Advanced
Messages 41623 - 41652 of 43381   Oldest  |  < Older  |  Newer >  |  Newest
Messages: Simplify | Expand   (Group by Topic) Author Sort by Date ^
41623
Posting Photos Please do take full advantage of the captioning possibilites that exist only in the "Photos" section to add labels and explanatory information...
skyquest-telescopes@y...
Send Email
Feb 1, 2009
12:47 pm
41624
Forum Rules This message, like the "Welcome Message", is sent automatically to new forum members, as well as being sent out automatically each month. The...
skyquest-telescopes@y...
Send Email
Feb 1, 2009
12:47 pm
41625
skyquest-telescopes: Welcome and Introduction Page Revised October 2003 1. Introduction and Background The skyquest-telescopes forum was founded in...
skyquest-telescopes@y...
Send Email
Feb 1, 2009
12:47 pm
41626
Well guys, i have the OTA flocked, the focuser painted flat black thru and thru, the mirror clips relieved of some pressure, and a tube extension built. I...
hudecjohn
Offline Send Email
Feb 2, 2009
11:35 pm
41627
... on ... outside ... than a ... better ... f/4.7 ... This is a good post, and right on the money. IMHO it was the Coulter Odyssey and Halley comet...
hudecjohn
Offline Send Email
Feb 2, 2009
11:41 pm
41628
From: "hudecjohn" <hudecjohn@...> ... About seven years ago I bought a 6" APO and driven equatorial mount for planetary observing. It's a great...
Jack & Lynn Kramer
starward12
Offline Send Email
Feb 3, 2009
12:17 am
41629
... Light hitting the back of our mirror is not going to affect your view: The aluminum on the face of the mirror will reflect it all out again through the...
Gene Baraff
g2baraff
Offline Send Email
Feb 3, 2009
1:03 am
41630
For a very first scope, a GEM is pretty tricky to set up and get used to IMO. I think a Dob is a perfect 1st scope. Depending on where he's keeping it, he...
johnwunderlin
Offline Send Email
Feb 3, 2009
4:03 pm
41631
John, I have been on the lookout for a hand truck, and I haven't seen one yet for $20.00. Maybe I am missing something? ... Blessings, Carol "There is no pit...
Carol Lugg
habakkuk2_1
Offline Send Email
Feb 3, 2009
4:21 pm
41632
On Tue, Feb 3, 2009 at 11:21 AM, Carol Lugg ... Needs some paint, but should work: http://cosprings.craigslist.org/for/1017087887.html <RE>...
RapidEye
rapideye.geo
Offline Send Email
Feb 3, 2009
4:30 pm
41633
... yet for ... I bought mine from our local Farm and Fleet. I don't remember the exact price, but I know it was <$30 anyway. Of course, this was 5+ years...
johnwunderlin
Offline Send Email
Feb 3, 2009
4:42 pm
41634
From: "johnwunderlin" <johnw@...> ... I've bought a lot of stuff at Farm and Fleet ... some of the best prices in the Midwest. I got my 12V...
Jack & Lynn Kramer
starward12
Offline Send Email
Feb 3, 2009
4:50 pm
41635
... the ... Wow, thanks Gene. But i was under the impression that some sort of flocking had to be done around the primary mirror? Does that mean just the...
hudecjohn
Offline Send Email
Feb 3, 2009
7:59 pm
41636
... . ... John, The flocking I was recommending around the primary was for a band 20 or so inches wide - ABOVE the primary. If you look through the eyepiece,...
Gene Baraff
g2baraff
Offline Send Email
Feb 3, 2009
11:30 pm
41637
... 20 ... from ... Oh!!!!! Thank you so much!!! I am not comfortable with the primary air slots being stopped up for possible cooling complications. I have...
hudecjohn
Offline Send Email
Feb 3, 2009
11:35 pm
41638
"I have been on the lookout for a hand truck, and I haven't seen one yet for $20.00. Maybe I am missing something?" Carol, I bought mine for $22.95 with...
James, Dan
dejtitan
Offline Send Email
Feb 4, 2009
1:11 pm
41639
I spoke with the folks at Starry Night and they said to use Pro or Pro Plus, not Enthusiast. There are issues with Vista but most (not all) have been resolved...
J R Hilland
hapkiyukwonsul
Offline Send Email
Feb 4, 2009
4:44 pm
41640
As you guys know i just followed the flocking instructions provided right here to the letter on my XT10 and last nite i got a chance to try the new and...
hudecjohn
Offline Send Email
Feb 4, 2009
6:20 pm
41641
hi guys what is the largest size i can stop my XT10 down to as an unobstructed system, and what focal length would it end up being? Thanks in advance!...
hudecjohn
Offline Send Email
Feb 4, 2009
10:26 pm
41642
John, I'm confused. The focal length is dictated by the curvature of the primary mirror. What do you mean by "stopping down"? Bob - N0DGN ... -- Bob - NØDGN ...
rbethman
rbethman1
Offline Send Email
Feb 4, 2009
10:40 pm
41643
you could stop it down to 85-90 mm and the focal length would still be 1200mm. the f/ ratio would change to about f/14 or so. There is a chapter in Robert...
bryandstone
Offline Send Email
Feb 4, 2009
10:49 pm
41644
Yes - BUT - he stated an "an unobstructed system". The more he "cuts down" the light input path, the more the secondary becomes a LARGER obstruction to the...
rbethman
rbethman1
Offline Send Email
Feb 4, 2009
10:58 pm
41645
... Hi. im sorry, by stopping down i meant blocking some of the incoming light with cardboard or something. And yes i did mean focal ratio, not length. I...
hudecjohn
Offline Send Email
Feb 4, 2009
11:07 pm
41646
The mask is off center, so it is unobstructed, and will give better clarity on planetary objects, especially when the air is turbulent. John ...
John Boyce
a3dart1
Offline Send Email
Feb 4, 2009
11:08 pm
41647
John, I'd NOT put the blocking piece into place UNTIL you have reached thermal equilibrium. Other than that, have a ball! Bob - N0DGN ... -- Bob - NØDGN ...
rbethman
rbethman1
Offline Send Email
Feb 4, 2009
11:47 pm
41648
From: "John Boyce" <jboyce@...> ... What passes for "better clarity" is improved contrast as a result of not having the light dispersion of the...
Jack & Lynn Kramer
starward12
Offline Send Email
Feb 4, 2009
11:55 pm
41649
... better ... turbulent. ... of not ... stopping down ... of the 10" ... the ... diaphragm on ... Thanks Jack, i actually suspected that this may be the case....
hudecjohn
Offline Send Email
Feb 5, 2009
12:06 am
41650
If you come out to the mountains of New Mexico where the air is quite turbulent I think there may be evenings where you might like to use a Hershel mask, on...
John Boyce
a3dart1
Offline Send Email
Feb 5, 2009
12:30 am
41651
From: "John Boyce" <jboyce@...> ... I've been coming to New Mexico on annual observing trips for over twenty years. Yes, the mountains do churn up the...
Jack & Lynn Kramer
starward12
Offline Send Email
Feb 5, 2009
12:49 am
41652
... I've done the same thing and gottern the same result: The increased aperture is more mportant than losing the diffraction caused by the secondary. Gene...
Gene Baraff
g2baraff
Offline Send Email
Feb 5, 2009
1:24 am
Messages 41623 - 41652 of 43381   Oldest  |  < Older  |  Newer >  |  Newest
Advanced
Add to My Yahoo!      XML What's This?

Copyright © 2010 Yahoo! Inc. All rights reserved.
Privacy Policy - Terms of Service - Guidelines - Help