I had 2 other photos each of only 2.5 minutes at ISO 1600
that I also took to one side of the Eta Carinae Nebula.
I combined them in a mosaic to get a larger picture.
They are all just single shots - no stacking.
Shows you the good signal to noise ratio at a dark site
with a bright target.
You can still see the join in the photo which
I will later try to remove.
I used Louie's ideas for star repair from his video
& also Fitswork 4.
Looks like I ended up with a nice wide mosaic &
I suppose I could add the left had side another time?
A larger version is here:
http://i262.photobucket.com/albums/i..._3frames_m.jpg