Re: [APML] Guide scope alignment

["bert katzung" <katzung1@home.com>]

Hi Don:
No, it's not necessary to have precise alignment of the imaging scope with
the guide scope: as long they're pointing to within a degree or two of each
other, you should be fine. Of course with fixed rings, you'll be somewhat
limited as to your guide stars; adjustable rings give you a much greater
number of choices that can be centered on the chip of your guiding CCD. One
other caution: if your primary (now guiding) scope is much longer than the
Megrez, watch out for the end of the OTA encroaching on the image.
Bert

Bert Katzung
katzung1@home.com
www.astronomy-images.com

----- Original Message -----
From: "Donald Peterson" <donpetersonii@hotmail.com>
To: <astro-photo@seds.org>
Sent: Tuesday, November 20, 2001 8:47 AM
Subject: [APML] Guide scope alignment


> Dear list,
>
> I have always used an OAG, never a guide scope.  Just bought a Megrez 80
as
> a travel scope but would like to shoot some wide field with it using my
> primary scope as a guide scope.  Assuming proper polar alignment of the
> mount, is it necessary to precisely align the Megrez with my primary scope
> (which would be used to guide)?  The Megrez comes with some nice
clamp-type
> rings and I am trying to decide whether I need to buy adjustable rings so
as
> to align it.  Any help would be appreciated.
>
> Thanks,
>
> Don Peterson
>



--  APML Archives at <http://astro.umsystem.edu/apml/>  ---
             Unsubscribe at <majordomo@seds.org>