Just out of curiousity I'm wondering how long others have managed a
typical unguided CCD exposure. I've managed 4 minutes once at F/5.0
but most of the time despite good "drift aligning" I can only get 2
minutes most nights. 90 seconds being the norm. Am I expecting too
much for a portable tripod setup which I take down each night?
The old AP 400 QMD was just as accurate when trying to do CCD work. I
was hoping the 600E would be an improvment.
Training the PEC dosen't seem to help.
I'm using an old C8 and was wondering if "mirror shift" may be the