Daveskywill
18-06-2018, 01:16 PM
You can see that the stars have elongated left-right, I guess because the polar alignment was out of whack and maybe I didn't autoguide*, though, as you can see in that big, bright blue star, the star-spikes on it have flared to the upper and lower portion.
Apparently the first effect is due to star elongation, natural trailing, and the 2nd error is some optical thing...right?
*And about 'Field rotation': can that happen when slightly mispolar aligned? or slightly mispolar aligned and autoguiding?
Like one time before, I tried autoguiding and this even made my star trails worse than with no guiding going...why? How could that be?
Apparently the first effect is due to star elongation, natural trailing, and the 2nd error is some optical thing...right?
*And about 'Field rotation': can that happen when slightly mispolar aligned? or slightly mispolar aligned and autoguiding?
Like one time before, I tried autoguiding and this even made my star trails worse than with no guiding going...why? How could that be?