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Re: [APML] Guiding far from the object
Nicola,
You always want to guide on a star near the middle of FOV if you can. The farther away the guide star, the more these errors will be magnified:
* polar alignment
* flexure
* atmospheric refraction
However, if you have a virtually-perfectly polar aligned mount, and if there is no detectable flexure in the system, and if you are imaging near zenith, then guiding out of field should work fine.
The real solution for your predicament is an autoguider. Used ST-4's can still be bought on astromart.
Matt
At 07:42 AM 6/27/2002, Nicola Montecchiari wrote:
>Hello all,
>
>do you see any problem in guiding with a star that is far from the object you are shooting?
>I'd like to shoot NGC7000 for instance and at my latitude is at zenit in this period, and I don't want to have my neck broken because I have to be in an unconfortable position :-)
>
>thanks!
>Nicola
--
Matt BenDaniel
matt@starmatt.com
http://starmatt.com
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