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Subject: Re: [M]: star test LX200
From: Robin Casady
Reply To: mapug@shore.net
Date: Sat Jan 25 01:18:55 1997

Bill Arnett wrote:
>
> At 7:17 PM -0800 1/24/97, Bruce Segal wrote:
> >I have a 12"LX 200 and I want to see if my scope is perfectly aligned and
> >free from aberrations. I am thinking about getting Star Testing Astronomical
> >Telescopes but I want to know if they cover SCT scopes like the LX 200
> >(their add describes a Newtonian).
> >Is this the book I'm looking for?
>
> Yes. Most of the tests apply all kinds of scopes.
>
> The hardest part is finding an observing site with good enough seeing to do
> the test adequately. In indoor setup is best if you have a really long
> space (several hundred feet) that can be darkened completely. Maybe we
> should all rent the SuperDome for a day and have a massive star testing
> session :-)

I am using the needle point hole in aluminum foil at 35 ft. to attempt
to collimate a 7" Mak. The "star" image is quite small at 600x and has
refraction rings. Am I wasting my time with only 35 ft. of distance? It
looks like a star image to me, but I am new at this.

-- 
Robin Casady
http://www.scruz.net/~rcasady/

Casady & Greene, Inc.
Award Winning Software for the Macintosh
http://www.casadyg.com
Astronomy Software
http://www.scruz.net/~rcasady/InfoGenie/IG_Index.html
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