Hi all, looking for some guidance on what I've done wrong in my last imaging session.
Background info: equipment used, Star Adventurer tracker, ED72 scope & D5300 DSLR.
Setup steps: level tripod, polar align (using SharpCap), tracking speed set to star, 90 second exposures
As you can see from the 3 images my target of M31 has drifted across my frame over the course of the session approx. 2hrs (red box is center on all images)
I've used this setup several times and not had this issue before, can somebody give me any info on what might have gone wrong in this session please?
Many thanks.