Re: [APML] Guidescope / set-up question / Thanks!!!

["Matthias Felsch" <box2@mfelsch.de>]

----- Original Message ----- 
From: "Ulrich Beinert" <analemma@gmx.de>
To: <astro-photo@seds.org> 
Sent: Monday, October 08, 2001 10:33 PM
Subject: Re: [APML] Guidescope / set-up question / Thanks!!! 



> --- No! that's the beauty of a guidescope, you can choose from a whole lot
> of stars close to the field you're shooting. The further away you are from
> your field, though, the worse field rotation will be, if there is any(!!!).
> If you are perfectly polar aligned, you will have no field rotation, but as
> this is almost never the case, you should be close (a few degrees) to the
> field you are shooting.

If you want to calculate how far you may go, see
http://www.covingtoninnovations.com/astro/Polar.html

a very useful tool by Michael Covington.

Matthias







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