... I just walk into our local pharmacy and they order it for me--next day delivery....one of the nice things about using collodion is that the mirror comes...
819
Neal Galt
neal@...
Feb 11, 2001 11:41 pm
With a 36" mirror, I simply put on distilled water with one drop of dawn/quart and gently swish it around....this with the scope pointed straight up. Then...
818
Wayne Howell
whowell@...
Feb 11, 2001 10:22 pm
... As far as I'm concerned, you can't beat collodion. I don't like handling the mirror any more than I have to, and with collodion I leave it right in the...
817
kent
kent@...
Feb 11, 2001 9:52 pm
I tried Collodion back in the 70s. Sometimes the results were good, but more often it left residues. Distilled water and cotton is sooo much cheaper and less...
816
kent
kent@...
Feb 11, 2001 9:52 pm
I clean my 25" while still in the mirror box. Tilt the telscope downward. Get a spray bottle and fill it with distilled water. Get a second spray bottle and...
815
Andy Wallace
andywallace@...
Feb 11, 2001 9:50 pm
Also, unless you are sure you have almost pure alcohol--which is hard to find at the corner drug store--the additives such as perfumes to mask the smell can...
814
Jan van Gastel
jhm.vangastel@...
Feb 11, 2001 8:28 pm
I always use this metod, exept for the alcohol. The remainig water drops after pouring destilled water over the mirror (which is tilted by about 60 degrees) is...
813
Tom Zefo
tzefo@...
Feb 11, 2001 8:04 pm
Hi Adrian Mirror cleaning methods can be very subjective. However one method I tried with great success can found at ... ...
812
Adrian Orr
jao@...
Feb 11, 2001 7:40 pm
Hi all I've not posted on this group before but have found the wealth of info in the exchanges very useful. I now need some advice. I would welcome comment on...
811
Pete Johnson
pjohnson1@...
Feb 10, 2001 10:07 pm
Mike, From my experience, the best way to avoid having a mirror quality problem is to buy the slowest scope you can handle from the best mirror maker you can...
810
shneor@...
Feb 9, 2001 8:01 pm
... briefly ... I had to return a scope I bought last year because ... have ... and I'm ... had to ... my new ... Just want to note that with mirror this size,...
809
m.vanderhoff@...
Feb 9, 2001 7:55 pm
... never mind i found Newt on the net and dowmloaded it so no need to send it to me thanks anyway. that would be great my email is m.vanderhoff@m... ... any ...
808
BILL BRIGGS
wbriggs811@...
Feb 9, 2001 5:46 pm
That is correct about the minor axis and then there is a correction of about .17" for the offset of the secondary. ... From: <m.vanderhoff@...> To:...
807
m.vanderhoff@...
Feb 9, 2001 5:22 pm
that would be great my email is m.vanderhoff@... ... play with ... point, ... vignetting. I ... focuser, and ... secondary ... the ... see the ... ...
806
m.vanderhoff@...
Feb 9, 2001 5:21 pm
I assume you use the minor axis for the size of your secondary. for the mesurement? ... my 18". ... focal ... then drew ... go up the ... the ... move...
805
William Possel
starsplitterbill@...
Feb 9, 2001 5:19 am
Hi JD, I went from a 15" Starsplitter to a 20" Starsplitter last summer. What a difference!! Views are incredible! Galaxies and nebulaes that seemed tough ...
804
Max405@...
Feb 8, 2001 10:47 pm
Hello Mike (both mikes in fact), Thank you so much for your great advice. I kind of sensed that the 25 would be the way to go. I am going to be very careful...
803
Jan van Gastel
jhm.vangastel@...
Feb 8, 2001 8:26 pm
There's also another very good Newtonian design program on the net, made by Jim Fly. It askes for more input, but the output is much more detailed as well, as...
802
mharveyww1@...
Feb 8, 2001 6:11 pm
I went from an 18" to a 20". The performance increase is noticeable, but not dramatic. On the other hand...moving up to a 24" or 25" DOES produce a dramatic ...
801
Bartolini, David
dbartolini@...
Feb 8, 2001 4:29 pm
There is a shareware program called Newt that will allow you to play with different configurations. It shows you if you're vignetting at any point, and you can...
800
BILL BRIGGS
wbriggs811@...
Feb 8, 2001 4:10 pm
Without doing a lot of math this is how I figured the distance for my 18". Your mirror is 10", so consider a triangle with a base of 10". The focal length is...
799
Mike Barrs
mbarrs@...
Feb 8, 2001 4:02 pm
Hi JD, I used an 18" for many years. Last year I decided to upgrade... I briefly owned a 22", and I have a new 24" on order. A 20" probably isn't worth the...
798
m.vanderhoff@...
Feb 8, 2001 3:14 pm
how do I calculate the distance from my primary to my secodary mirror. I have a 10" f4.5 mirror and as it sits now i cannot see the edge of the primary in the...
797
Max405@...
Feb 8, 2001 3:41 am
Hello everyone, I need some help. I have an 18 inch starsplitter with a killer hand select galaxy mirror. I just bought a c14 and I plan on using it alot. I am...
796
reidwilliams@...
Feb 7, 2001 11:57 pm
... price"? ... Sorry about that. It was $350.00 He has an ad on astromart now....here it is. Astromart Classifieds Ad number: 66678 For Sale: Telescope -...
795
djm28@...
Feb 7, 2001 6:09 am
... of glass ... to be ... the very ... higher ... The Powermates are indeed amazing. Also worth considering (at a much lower cost and with less performance...
794
Tom Zefo
tzefo@...
Feb 5, 2001 11:55 pm
Hi Joe Your Barlow effectively makes your scope an f/9 (assuming it's a 2x) so the Paracorr really isn't needed. Tom ... From: Joe Morris...
793
Ken Coates
ken@...
Feb 5, 2001 11:15 pm
Reid, If you don't mind saying, how much was "a very reasonable price"? Thanks, Ken ============================= Date: Fri, 02 Feb 2001 02:02:15 -0000 From:...
792
Joe Morris
jmorris_n4eu@...
Feb 5, 2001 10:45 pm
Hi Bigdobers! I have an 15", f/4.5 Obsession and have just added a Paracorr. The Paracorr instructions say not to use a Barlow with the Paracorr, the reason...
791
Fumbler1013@...
Feb 5, 2001 3:02 pm
In a message dated 2/5/01 9:29:53 AM Eastern Standard Time, ... I'm in it! :-) I just can't make it to meetings and star parties because dorm students are...
