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Nice one Rob.
I don't quite understand something though with this image. You have the larger stars round and the other smaller stars elongated from tracking errors. How come? Were there a few subexposures with tracking errors?
Here's a technique that can save some subexposures with tracking errors:
1. make a duplicate layer.
2. Set it to "darken".
3. Filters/others/offset
4. Set it to different amounts for vertical and horzontal to help correct the elongated stars.
5. Layers/flatten image.
You can also lassoo the area of the galaxy so only the stars get offset.
You'll save some images that way.
Also you can use the smudge tool to push elongated stars from different angles to make them rounder.
A couple of tricks for you mate.
Greg.
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