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Originally Posted by rally
Guys this is all in the manual.
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Yes but it seemed to imply that Tpoint points you at the refracted pole. It does not say it will get you close and then you just turn on Protrack. The manual is not all that concise in this matter.
I personally have read the manual on Tpoint at least 10 times now and never got the impression that it points you at the true pole and you just need to add for the refracted pole.
Quote:
Originally Posted by rally
To get a good PA you really don't need many points at all, 10-20 is plenty, the extra mapped points are needed for Tpoint to correct for other terms of mechanical error and for Protrack.
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I did several runs at 30 and the runs at 50 and 100 gave me better results. I startted doing runs of 100 once I got the PA right with the smaller runs, however the slop in the Dec axis meant that Tpoint reported the PA was way off. Yes the extra points are for pointing only and not for PA. That is the main aim here. I can drift align to get good PA but I want good pointing Rally. There is no confusion here in my mind.
Quote:
Originally Posted by rally
PE has nothing to do with the polar alignment and pointing corrections - PE is usually much less of an error than the refracted pole to true pole error ie an arc second or two for PE verses an arc minute or two for atmospheric refraction shifting the optical polar alignment.
Good Guiding will take care of all of this in any event without Protrack
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Yes PE is worm gear related and not a pointing related problem. PE affects guiding and tracking and nothing more. What makes you think we were meaning this?
Thanks Gary for your explanation.