Re: [ATM] which Collimination tools?

["Jan van Gastel" <jhm.vangastel@wanadoo.nl>]

I use a laser to point the optical axis of the eyepiece at the center of the
primary, by manupulating the secondary or/and the focuser and I use
callibrated cheshire to point the optial axis of the primary at the focal
point, by turning the primary's collimation bolts. Just a couple of minutes
work in the field and very accurate.

Before I had a laser I used a sight tube to point the optical axis of the
eyepiece at the center of the mirror, but  a laser works easier.

If the secondary is not centered well enough in the focuser, this has to be
done first (using a sight tube), but mine is always in the right place,
because I check it at home sometimes.

Jan
http://home.wanadoo.nl/jhm.vangastel/Astronomy/

----- Original Message ----- 
From: "John Moore" <jamoore42@yahoo.com>
To: <atm@atmlist.net>
Sent: Sunday, July 24, 2005 7:28 PM
Subject: [ATM] which Collimination tools?


> Hi All,,
>
> Ok, this is driving me crazy,,Im trying to study-up
> on Collimination,,,Finding info on Collimination is easy!,
> But differant people Im reading about say to use differant
> tools?,,examples;
>
> set;
> 1.sight tube, chesser,,laser-tube.
> 2.sight tube,chesser,autocolliminator.
> 3.sight tube,chesser.
>
> Which ones do I realy Need??
>
> Help!!!!
>
> John Moore.
>
>
>
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