I have posted a before and after frame on the bottom of my webpage. While the display images have been non-linear stretched I used exactly the same constants while processing both images so they should be directly comparable to the visual appearance of the comet. The difference before and after is subtle but clear. http://www.siowl.com Thanks for the visual reports! I was glad to hear the some observers without a CCD were also able to see a difference. Andrew Andrew Cooper ---------------------------------------------------- http://www.siowl.com -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.