Hello Astrobin community,
during the last few sessions doing Deep Sky Imaging I have had trouble with exposures longer than 4-5 minutes. Two nights ago the stars where egg-shaped during the whole 4 hour session (8 Minute subs). Last night the stars had a different shape. More like the star was doubled from vibration (a bigger and a smaller image of the same star besides). The artefacts pointed into a different direction every night even though the camera was mounted exactly the same way on the telescope.
My technique worked well before with the same equipment and the same approach. I even did 10 Minute subs without trouble before.
There also was no wind at all in these nights.
My Equipment is a 150/750 Newtonian on a EQ6R-Pro, a Lacterta MGEN 2 mounted on a 8x50 guide scope, and a Nikon DSLR. I am polar aligning manually but I always make sure that it is as good as it can be.
Any help would be appreciated!
Steffen
By the way: I hope this is the right sub forum for such a question?
during the last few sessions doing Deep Sky Imaging I have had trouble with exposures longer than 4-5 minutes. Two nights ago the stars where egg-shaped during the whole 4 hour session (8 Minute subs). Last night the stars had a different shape. More like the star was doubled from vibration (a bigger and a smaller image of the same star besides). The artefacts pointed into a different direction every night even though the camera was mounted exactly the same way on the telescope.
My technique worked well before with the same equipment and the same approach. I even did 10 Minute subs without trouble before.
There also was no wind at all in these nights.
My Equipment is a 150/750 Newtonian on a EQ6R-Pro, a Lacterta MGEN 2 mounted on a 8x50 guide scope, and a Nikon DSLR. I am polar aligning manually but I always make sure that it is as good as it can be.
Any help would be appreciated!
Steffen
By the way: I hope this is the right sub forum for such a question?
