So having restored them from the Recycle Bin I set about the rescue misson.
I loaded each file in turn, then split the Red, Green & Blue fields (as Gerald demonstrated the other evening), flipped the G & B and then re-merged them.
Using the IRIS Looper utility (http://www.wilmslowastro.com/software/d ... er_v04.zip) it was easy to run the following loop of instructions:
split_rgb r g b
merge_rgb r g b
on each of my 25 lights and 24 calibration frames - it only took a few minutes.
Then I was able to follow the usual processing work-flow to obtain this image: So the morals of the story are:
- don't throw away "useless" images - you may eventually discover a way to rescue them!
- it's well worth the time spent learning to use the IRIS program
- use the not-so-dark nights to practice with your camera, computer & software, so you'll have everything sussed in time for the winter...