I agree with marc, still a way to go with the collimation, especially if this was taken from the exact centre of the frame. Check concentricity with Al Sheeny's collimating aid. See thread here:
http://www.iceinspace.com.au/forum/s...ad.php?t=62696
See software zipped file download here:
http://www.iceinspace.com.au/forum/a...6&d=1277197092
Ted