So I'd look at arc-min accuracy with the polar alignment assistant tool. Then for a more accurate alignment then I'll go to the drift tool.

Another question is that would Ekos consider to support additional camera (i.e. 3rd camera) in the equipment profile.
What I have is a rainbowastro mount, and there're no optical polarscope.

And I made myself a DIY "polemaster" like setup, which is an ASI 178 camera with a 50mm CCTV lens, mounting with the polemaster adapter locked rainbowastro mount body, and attempting to use Ekos polar alignment assistance.
I'm using OAG to guide - the OAG mounted to the main scope and will be too narrow for the polar alignment assistance to pickup at the platesolve.
So there're 3 cameras operating at the same time: the one used for polar alignment, the guide cam at the OAG and the main CCD.

What I'm doing now is to connect to different profiles: First I connect to a profile where the ASI 178 as the guidecam with the 50mm lens, and do the polar alignment.
After the polar alignment is done I will have to disconnect, and switch the equipment profile for guiding and imaging. This would work, but is a little time-consuming.
 

Read More...