Quote:
Originally Posted by Zuts
Hi,
I think you mean 300 seconds, not 3000 seconds. Anyway I think your polar alignment needs to be better. What are you using for guiding, whatever it is, it normally gives you an idea on screen what sort of corrections it is making.
Ideally they should be under 1 pixel. If they are and you are still getting elongated stars then your guidescope is not seeing what the imaging cd is seeing and you should look at tightening everything up.
Paul
Edit:
If it is really 3000 seconds or 50 minutes then probably the alignment is pretty damn good and you should go back to 5 minute subs, however I dont see enough data for a 50 minute sub so am assuming you meant 300 seconds.
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It was a 3000s exposure, i had turned the gain and offset down to 1 and 5 respectively, so that probably explains why it was so dark (ive got no idea how to use those gain and offsets yet, and this was also an experiement in that).
I have been averaging about 1000s exposures for most of my shots, but tonight i want to get a good polar alignment... actually do program my PEC on my mount (i havent been confident enough in my polar alignment to do this yet) and have a go at some 300-600s subs... as the subs people have are amazing.....
If anyone reading this is willing, would someone be able to post a single sub of an image (the lagoon nebula if possible) so i can see what i should be aiming for.
Also, does anyone have any hints and tips about shooting a galaxy ?
This is my life ambition... and the way ive been going, it just may take that long
