[AZ-Observing] Re: Need Advice on Losmandy Polar Alignment
- From: "Jon Christensen" <jonc97@xxxxxxx>
- To: <az-observing@xxxxxxxxxxxxx>
- Date: Thu, 28 May 2009 20:42:50 -0700
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
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