---- Dan Heim <dan@xxxxxxxxxxxxx> wrote: > No black drop. Did anyone see it? Dan, The black drop is a sign of bad optics, poor conditions, too-small image scale, or all of the above. When the Swedish Solar Telescope showed no black drop in the 2004 transit, that was the end of the discussion. Seeing no black drop is a good thing! Tom -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.