Following is a long account. Observation is at the end. First Words on amastropak yahoogroup When I first read Zain's email about Karachi peoples' plan to go...
19883
John Lightholder
rexhavoc449
Dec 11, 2010 2:40 am
Hi Ali, Your energy, excitement and passion for all things astronomy makes for a fantastic story!! You guys did the full, all night astro-marathon for sure. I...
19884
A
ak6666666
Dec 13, 2010 3:37 am
Thanks John. Yes I remember that at one time dollar to rupee was fixed at one to ten. Now its 86 or thereabout. Thanks for liking my story. That night has...
19885
Roger Greenwood
astrocrumb
Dec 30, 2010 4:09 pm
Hello all: I am about to install a new fiberglass UTA ring on an Obsession 18" UC. I have the option to put the focuser where I want. Which is not where it...
19886
pierredesvaux
Dec 30, 2010 9:22 pm
I have some difficulty to make a choice between the various drive and GOTO systems available on the market for a big dob (24" and over). I have noticed the...
19887
Mike Wolford
m_j_wolford
Dec 30, 2010 10:06 pm
Hello, I personally own three ServoCAT systems. One on a 12.5" Starmaster, One on a 15" Discovery (truss type), and one on a 22" Telekit. Two of them are ...
19888
Paul
palsing
Dec 30, 2010 10:50 pm
I have some difficulty to make a choice between the various drive and GOTO systems available on the market for a big dob (24" and over). I have noticed the...
19889
Malco Precision
mrmalco1
Dec 31, 2010 12:33 am
I have a ServoCat on my 20" Obsession which I installed myself. I also was worried about the clutches, but once you are aligned there is really no reason to...
19890
John Mahony
jmmahony
Dec 31, 2010 3:21 pm
The SiTech system is based on the home-brew system developed by Mel Bartels years ago (I think his was the very first dob goto system). So one advantage is ...
19891
atmpob
Dec 31, 2010 6:59 pm
Mel sells the system but it does not use his free software. The stepper version of Mel's software is free but not the servo system. The only thing that is...
19892
Neil
lowentress
Jan 1, 2011 6:06 pm
Hello all and happy new year, What about the issue of which side to have it, some seasoned observers (such as Daniel Mounsey) say it is important for the best...
19893
atmpob
Jan 1, 2011 10:57 pm
Hmm. Let's suppose the wind is blowing from the west. I have the scope pointed north. Then I point it south. Opps one of those will blow the body heat into...
19894
Roger Greenwood
astrocrumb
Jan 2, 2011 3:29 am
I think that the amount of body heat radiated would be so minimal as it would virtually be undetectable through the EP. That is the heat dissipating outside...
19895
fernandorivera3
Jan 2, 2011 4:05 am
Hello, I have a question for members of this group. I am thinking of buying a Dob scope later this year (structure only at first-not decided yet on aperture)....
19896
George Andrew
geodandrew
Jan 2, 2011 7:35 am
Hi group No real opinion here either but to through another name into the mix. Has anyone thought about one of the dream cellular mirrors? ...
19897
Víctor Martínez
acrab67
Jan 2, 2011 9:15 am
Hi, I would recommend to Terry Ostahowski http://www.ostahowskioptics.com/ Best regards, Happy New Year and clear skies Víctor De: bigdob@yahoogroups.com...
19898
John Mahony
jmmahony
Jan 2, 2011 3:49 pm
A scope in the N hemisphere will be pointed S much more than N, since as the sky rotates, there's more sky there. Traditionally, focusers are put on the right...
19899
John Mahony
jmmahony
Jan 2, 2011 4:33 pm
There have been a few companies claiming to sell cellular mirrors to amateurs, but I'd be careful since most of the few I've heard of have not been able to ...
19900
brock.family
debrock2
Jan 2, 2011 10:29 pm
I'm in the Southern hemisphere and my focuser is on the left (looking from behind). I have it that way because I observe with my right eye. Sky rotation or...
19901
Fernando Rivera III
fernandorivera3
Jan 3, 2011 1:13 am
Hello, I am the one who posted the question regarding various optics manufacturers & use of their mirrors in big Dobsonians. I forgot to mention Zambuto...
19902
pensack1
Jan 3, 2011 2:38 am
Funny. I'm a right eye viewer and I put my focuser on the right if standing behind the scope looking up at the front of the scope. The reason is this--I move...
19903
brock.family
debrock2
Jan 3, 2011 3:29 am
The main factor for me is not the focuser so much but the finder, or more specifically looking along a UTA strut to line up an object into the finder with my...
19904
tsulmer1
Jan 3, 2011 5:22 am
Ditto for me. I'm also a right eye viewer. I put my focuser on the left side (standing behind the scope) so that I could easily use my right eye in a finder...
19905
geodandrew@...
geodandrew
Jan 3, 2011 5:34 am
Hi John I saw this mirror at NEAF. I think it was a "HOT" product in 2009 in S&T. George F5 ??? Sent from my Verizon Wireless BlackBerry ... From: John Mahony...
19906
parabola30
Jan 3, 2011 5:49 pm
Hello, Speaking from direct experience.... Dream Cellular is currently the only vendor that I will deal with for cast cellular blanks. Their product, based on...
19907
pensack1
Jan 4, 2011 1:14 am
Dave, I'm left eye dominant, so I look through the finder with my left eye. However, it doesn't have the visual acuity of my right eye, so I observe with the...
19908
tsulmer1
Jan 4, 2011 1:26 am
Don, Yes, I'm talking about rotating the entire truss/tube structure. I agree that collimation would not hold by only rotating the top (and I don't want to...
19909
atmpob
Jan 4, 2011 4:15 am
I hope people don't mind me pointing out that the original question is no longer being addressed by this thread. It was not about what side the focuser should...
19910
tsulmer1
Jan 4, 2011 6:30 am
I prefer the as delivered position (diagonal) as I also feel it offers more comfortable viewing at a greater range of altitudes. Tim in Calgary...
19911
pensack1
Jan 4, 2011 7:26 am
Dale, That's the dob dilemma. At high altitudes, the side position is best. At low positions, a more topside focuser position is best. It depends on the size...
