Re: Tracking w/ Passil 4 polar alignment


Roland Christen
 

Even if the polar alignment is spot on you will need to use a PEM curve.  I'm guessing here because you did not provide enough information to go on. For instance, what direction did the trailing go, where in the sky did you image. There is no information on how the scope is being held, or the camera, or whether there is focuser sag. Lots of things can add up to give poor results.

Rolando



-----Original Message-----
From: Wiggins, Rick <rickwiggins@...>
To: main@ap-gto.groups.io
Sent: Tue, Jul 21, 2020 12:58 pm
Subject: Re: [ap-gto] Tracking w/ Passil 4 polar alignment

Hi Roland,
I did setup using the pasill4 polar scope and got good alignment on the two stars through the polar scope. I did not use a PE curve. Do you think slight smearing in 25 secs given that rough setup is reasonable or should it be better?
Thanks, Rick

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