Quote:
Originally Posted by xelasnave
As an aside to the op.
Due to technical difficulties I have been forced to use the short exposure approach.
If seeing fluctuates or a plane crosses your view you lose only a short sub ..so many of mine at only thirty seconds...but it surprises me just what you can capture with many good short subs.
It will be some time before I think I will take on very dim objects.
Alex
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Thanks.
As mentioned before, I'm still learning, so I've been keeping quiet and learning from the others. Lots of good info here that I will be referring back to. I don't have the luxury of too much sky time at the moment, so in terms of finding practical limits it will be a while before I have the time to test things myself, but my curiosity did get the better of me on this point.
I guess from a practical point of view, I wonder how people assess the magnitude of stars when the freely available catalogs I've seen don't go past mag 21 or so. Or is it a simple astrometric calculation based on a plate solve?
Best
Markus