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  #16  
Old 09-09-2020, 03:38 PM
Startrek (Martin)
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Startrek is offline
 
Join Date: Dec 2017
Location: Sydney
Posts: 2,929
Guiding is mainly affected by -
1/Atmospheric seeing conditions
2/Mechanical issues with your mount ( Dec backlash )
3/ Focal length of your imaging scope
4/ Cable drag
5/ Image scale of your guide scope and main scope
6/ Guide settings

If your using PHD2 then it can tell you whatís wrong if your guiding is poor and can be one of the items above

For me 30 arc sec error on polar alignment is perfectly ok for PHD2 to correct , Iíve even had good guiding numbers on 1 arc minute polar alignment, it all depends on the items above

Cheers
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