[AZ-Observing] Re: Need Advice on Losmandy Polar Alignment

Jim,

I have polar aligned both my Titan before I sold it and now my AP1200 with a 
Losmandy polar alignment scope.  I know for sure that it is not completely 
accurate and I can see some field rotation between my images from the 
beginning of the night compared to those from the end of the night.  I 
believe this is because the polar scope does not point perfectly straight 
because I align the stars very well in it. I would consider the polar 
alignment I use to be pretty rough.  But since I align and combine the 
images with software it really hasn't been much of a problem.  The 
individual exposures (20 min) aren't enough to show that field rotation.


Regards,



Jon Christensen




----- Original Message ----- 
From: <jwaters125@xxxxxxx>
To: <az-observing@xxxxxxxxxxxxx>
Cc: <sac-forum@xxxxxxxxxxxxx>
Sent: Wednesday, May 27, 2009 10:28 PM
Subject: [AZ-Observing] Need Advice on Losmandy Polar Alignment


I have a G8 that I have been having some problems with.  I can not get an
accurate polar alignment on the mount.  I use the polar alignment scope
and align Polaris and the 2 other reference stars then proceed to drift
align the mount.  I have a feeling that my reticle in the polar scope is not
centered or I am drift aligning the mount incorrectly.

Is there somebody in the Phoenix metro area with a G8 or G11 that they
polar align for astrophotography?  I would like to meet up with you during
the next star party or chat over e-mail.

Jim Waters
EVAC
--
See message header for info on list archives or unsubscribing, and please
send personal replies to the author, not the list.

--
See message header for info on list archives or unsubscribing, and please 
send personal replies to the author, not the list.

Other related posts: