I have a 18" 2" thick f/4.5 mirror that was refigured 2 years ago and would like to have it Foucault tested to determine what I have. Its my understanding that this can also be done after the mirror has been coated. It originally had a turned edge, was over corrected in the center and had 2 high zones. I would like to know how the figure is now and how smooth the surface is. I would like to test it somewhere locally in AZ if at all possible to minimize my scope down time. I would be willing to drive it to its destination. Who would be able to do this? Thx. Jim Waters Phoenix, AZ jwaters125@xxxxxxx -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.