So I dismantled (again) my modded 1000D in the hope of addressing some star shape issues. In the process I thought I would also remove the anti-alias filter which I (perhaps foolishly) had left in place when I originally did the filter mod.
Well I had some clear skies the following night and thought "what better way to evaluate star shapes than with a globular cluster" - so Omega Centauri it was.
This image consists of 57 x 60secs and 44 x 120sec subs at ISO1600, with a 130mm f5 newtonian on a HEQ5 mount. Processed with Pixinsight
Large version here:
http://www.astrobin.com/full/80104/0/
[Still a little left-right elongation which I now suspect is due to the clip on the secondary mirror, as I have seen it with this scope with another camera. Fixing that is on the "to do" list for this weekend. ]
What do you think of the end result?